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VýS$Æý‡$ÐéÆý‡… l íœ{ºÐ]lÇ l 18 l 2016
10th Class Special- Physical Science
Sir C.V. Raman explained the phenomenon of light scattering
in gases and liquids. He found experimentally that the frequency of scattered light by the liquids is greater than the frequency
of incident light. This is called Raman Effect.
Physical Science.. Success Plan
Prepared by:
G.Ñ. çÜ$«§éMýSÆŠæ,
gñæyŠæï³òßæ^ŒæG‹Ü& C¯]l$MýS$Ç¢,
¯ðlË*ÏÆý‡$ hÌêÏ.
9.
A.
10.
1. HEAT
A.
IMPORTANT QUESTIONS
1 Mark
1. Convert 20ºC into Kelvin scale?
A. Temperature in Kelvin = 273 + Temperature in degree celcius
∴ K = 273 + C
C = 20oC
K = 273 + 20 = 293
∴ 20oC = 293k
2. How fog is formed.
A. At very low temperature, the water molecules present in vapour condense on the
dust particles in air to form a thick mist
known as fog. Fog reduces visibility by a
large extent.
3. Write the effect of pressure, on melting of
ice?
A. With increase in pressure the melting
point of ice reduces.
4. Equal amounts of water kept in a cup and
in a dish. Which will evaporate faster?
Why?
A. The surface area of water in dish is more
than the surface area of water in cup.
Evaporation increases with increasing in
surface area. So, water in dish will evaporate faster.
5. A desert is very hot in the day and very
cool at night why?
A. Because of low specific heat capacity, air
above earth heated up quickly in the day
and cooled quickly at night.
6. Why does ice floats on water?
A. When water converts into ice its volume
increases so density decreases. Hence density of ice is less than water, ice floats on
water.
7. What is latent heat of vapourization?
A. The heat energy required to change 1 gm
of liquid to gas at constant temperature is
called latent heat of vapourization.
8. Why do we sweat while doing a work?
A. When we work, our bodies produce heat.
As a result the temperature of the skin
becomes higher and water in the sweat
Oxidation is a
reaction that involves
the addition of oxygen or
removal of hydrogen.
Reduction is a reaction that
involves the addition
of hydrogen or
removal of
oxygen.
11.
A.
glands start evaporating. This evaporation
cools the body.
What is humidity?
The amount of water vapour present in air
is called humidity.
What are the factors affecting rate of evaporation?
Surface area, temperature and amount of
water vapour already present in the surrounding air
What is the value of latent heat of fusion
of ice?
80 cal/gm
2 Marks
1. What would be the final temperature of a
mixture of 60 gm of water at 30ºC temperature and 60 gm of water at 60ºC temperature?
2. Why do we get dew on the surface of a
cold soft drink bottle kept in open air?
3. Write the differences between evaporation
and boiling?
4. Explain why dogs pant during hot summer
days using the concept of evaporation?
5. What happens to the water when wet
clothes dry?
6. What happens, when water is kept in a
refrigerator?
4 Marks
1. Your friend is asked to differentiate
between evaporation and boiling. What
question could you ask to make him to
know the difference between evaporation
and boiling?
2. How do you appreciate the role of the
higher specific heat of water in stabilising
atmospheric temperature during winter
and summer?
3. Determine the specific heat of solid experimentally?
4. Your teacher made an experiment that
shows the information of dew and frost.
Explain how you show they effect on the
rate of evaporation?
2. CHEMICAL REACTIONS
AND EQUATIONS
IMPORTANT QUESTIONS
1 Mark
1. Define formula unit?
A. A formula unit implies one unit, whether
atom ion or molecule corresponding to a
given formula.
2. Which chemical reaction is involved in
the corrosion of Iron?
A. Oxidation
3. NH4Cl → ΝΗ3 + ΗCl. What type of reaction it shows?
A. Chemical decomposition.
4. What are new substances formed due to
decomposition of Lead Nitrate?
A. PbO; NO2; O2
5. Write the examples of Anti-oxidants?
A. Vitamin E and Vitamin C.
6. Which gas is used in the chips like Lays
and Kurkure’s?
A. Nitrogen gas
7. Write the formula of rust?
A. Fe2O3.XH2O
8. State important uses of decomposition
reaction?
A. Extract metals from their compounds &
digestion of food.
9. What happens when silver chloride
exposed to sunlight?
A. 2 AgCl →2Ag+Cl2↑
10. Why photosynthesis reaction considered
as endothermic reaction?
A. During photosynthesis plants absorb heat
from sunlight. So, photosynthesis reaction
is example for endothermic reaction.
11. What is antioxidant?
A. The substance which is used to prevent
oxidation are called antioxidants.
12. Why do we apply paint on iron articles?
A. To prevent corrosion.
13. Give any two examples of double displacement reactions?
A. (i) BaCl2+Na2SO4→2NaCl+BaSO4
(ii) 2KI+Pb(NO3)2→ PbI2+2KNO3
14. Which metal is used in the manufacture of
Diwali crackers?
A. Magnesium.
15. Which type of reaction involved when silver bromide is exposed to sunlight?
A. Photo chemical reaction.
2 Marks
1. Name the reactants and products in the
following chemical equations.
Na2SO4 + BaCl2 → BaSO4 + 2NaCl
2. What is meant by precipitation reaction?
Give example?
3. Why does respiration reaction considered
as exothermic reaction? Explain?
4. What do you mean by corrosion? How can
you prevent it?
5. A shiny brown coloured ‘X’ on heating in
air becomes black colour. Can u predict
the element ‘X’ and the black colour substance formed? How do you support your
predictions?
4 Marks
1. What is information can we interpret from
a balanced chemical equation?
2. Balance the following chemical equations
including the physical states?
a) C6H12O6 →C2H5OH + CO2
b) Fe+O2 →Fe2O3
c) NH3+Cl2→N2H4+NH4Cl
d) Na+H2O→NaOH+H2
3. Give some daily life Oxidation Reactions?
4. Take two beakers and prepare Lead nitrate
aqueous solution and Potassium iodide
aqueous solutions. What are the colours of
solutions. Now mix them in another
beaker. What happens? What type of
chemical reaction it is? What are products
obtained?
5. Latha take some quantity of powder of a
substance in a test tube. Heated it with
spirit lamp. A gas was liberated. She send
the gas into another test tube. The colour
of solution in the second test tube turned
into milk white?
1) Which substance was heated
2) Which gas is liberated
3) What was the solution taken in second
test tube
4) Which type of chemical reactions
involved the experiment
3. REFLECTION OF LIGHT
BY DIFFERENT SURFACES
IMPORTANT QUESTIONS
1 Mark
1. Write differences between Real image and
Virtual image.
A. Real image can be obtained on a screen.
Virtual image cannot be obtained on a
screen.
2. The magnification of plane mirror is 1.
Give reasons.
A. Magnification +1 indicates the image is
erect and size of the image is equal to size
of the object.
3. What should happen if we increase the
size of the hole of the pinhole camera.
A. If the size of the hole of pinhole camera is
increased, the image seems to be blurred.
4. Name some apparatus which can work on
the principle of reflection of light.
A. Periscope & Kaleidoscope, Solar cooker,
solar heaters, TV, Dish Antenna.
5. State Fermat’s principle?
A. It states that the light selects the path
Niels Henrik David Bohr was a Danish physicist who made
foundational contributions to understanding atomic structure
and quantum theory, for which he received the Nobel Prize in
physics in 1922. Bohr was also a philosopher and a promoter.
6.
A.
7.
A.
8.
which takes the least time to travel. It is
also applicable to reflection of light.
Which type of mirrors are used in head
light of vehicles?
Concave mirrors are used in the head
lights of vehicles.
Why does our image appear thin or
bulged?
Due to converging (or) diverging of light
rays from the mirror.
Write the mirror formula?
 1 1 1
= +  ƒ: focal length, u : object
 f u v
A. 
distance, v = image distance
9. Which mirrors are used in saloons and
sweets shops?
A. Plane mirrors
10. Which principle involved in the working
of periscope?
A. Principle of reflection of light.
11. Which mirrors are used by dentists and
ENT specialist?
A. Concave mirrors
12. Preetham saw his face in the car's mirror
and found that his image is small. Which
type of mirror is that?
A. Convex mirror.
13. Which principle is used in the law of
reflection?
A. Fermat principle.
2 Marks
1. Explain the lateral (right-left) inversion of
the image in plane mirrors through an
example?
2. How do you appreciate the use of reflection of light by a concave mirror in making of T.V. antenna dishes?
3. Explain the process of making a solar
cooker/heater (or) Make a solar heater/
cooker and explain the process of making.
4. How do you appreciate the role of spherical mirrors in daily life? (or) What are the
applications of spherical mirrors in daily
life?
5. How do you find the focal length of a concave mirror?
6. Write the rules for sign convention of
spherical mirrors?
4 Marks
1. Write the experimental method to measure
the distance of object and image using
concave mirror? And write the table for
observations?
2. Write the experimental method in verification laws of reflection in plane mirrors?
3. How do you support your answer to
“When light gets reflected from a surface,
it selects the path that takes the least
time”?
4. What is magnification? Derive the formula for magnification of spherical mirrors?
4. ACIDS, BASES AND SALTS
IMPORTANT QUESTIONS
1 Mark
1. Is the substance present in antacid tablet
acidic or basic?
A. The substance present in antacid tablet is
basic.
2. Write any two acid-base indicators?
A. Methyl orange, Phenolphthalein.
3. Give an example for salt posses water of
crystallization?
A. CaSO4.2H2O; CuSO4.5H2O;
CaSO4.½H2O.
4. Write the chemical name of Baking soda?
A. Sodium hydrogen carbonate
5. Write the formula of plaster of Paris?
A. CaSO4.½H2O
6. Why does distilled water not conduct electricity?
A. Distilled water does not conduct electricity due to no ions present in distilled water.
7. Give two examples of neutralization
reaction?
A. NaOH+HCl →NaCl+H2O
NaOH+CH3COOH →CH3COONa+H2O
8. What is acid rain?
A. When pH of rain water is less than 5.6, it is
called acid rain.
9. What are Amphoteric oxides?
A. Oxides capable of showing properties for
both acids & bases.
10. Which substance is used for making
chalks and fire proof material?
A. Plaster of Paris.
11. Give any two examples of olfactory indicators?
A. Vanilla essence & clove oil.
12. Write the formula of baking soda & washing soda?
A. Baking soda : NaHCO3
Washing Soda : Na2CO3.10H2O
13. Which acid derived from lemon and turn
blue litmus to Red?
A. Citric acid.
14. Define universal pH indicator?
A. A mixture of several indicator is called
universal pH indicator.
15. Define alkalis?
A. Bases which are soluble in water are
called alkalis.
16. Which substance used to control the stomach pain causes due to indigestion?
A. Antacid.
2 Marks
1. Conduct an activity to know the strength
of acid (or) base?
2. Plaster of paris should be stored in a moisture proof container explain why?
3. Fresh milk has a pH of 6. How does the pH
change as it turns to curd? Explain your
answer?
4 Marks
1. Equal lengths of Mg ribbons are taken in
test tubes A and B. Hydrochloric acid is
added to test tube A. While acetic acid is
added to test tube B. Amount of concentration of both the acids is same. In which
test tube will the fizzing occurs more vigorously and why ?
2. Write the formulae for the following salts.
(a) Sodium sulphate (b) Ammonium chloride. Identify the acids and bases for
which the above salts are obtained also
write chemical equations for the reactions
between such acids and bases which type
of chemical reactions they are?
VýS$Æý‡$ÐéÆý‡… l íœ{ºÐ]lÇ l 18 l 2016
10th Class Special- Physical Science
3. Compounds such as alcohols and glucose
contain hydrogen but are not categorized
as acids. Describe an activity to prove it.
4. Acids produce ions only in aqueous solution? Justify your answer with an activity.
5. Write any 4 uses of (a) Washing soda
(b) Baking soda.
5.REFRACTION OF LIGHT
AT PLANE SURFACES
IMPORTANT QUESTIONS
1 Mark
1. Can you take a photograph of a mirage?
A. Yes, eventhough mirage is a virtual image,
we can take the photograph of a mirage.
2. Define critical angle?
A. The angle of incidence in denser medium
for which the angle of refraction in the
rarer medium is 90º is called critical angle.
3
A. The perpendicular distance between the
emergent and incident rays which are parallel is called shift.
12. Is the refractive index for a given pair of
medium depend on the angle of incidence?
A. No. It is independent of the angle of incidence.
2 Marks
1. How do you appreciate the process of total
internal reflection in nature?
2. You are given kerosene, ice and water. In
which of these does the light travel faster?
3. How do you appreciate the role of Fermat
principle in drawing ray diagrams.
4. What is the angle of deviation produced
by a glass slab? Explain with ray diagram?
5. Why is it difficult to shoot a fish swimming in water?
6. Take a bright metal ball and make it black
with soot in a candle flame. Immerse it in
water. How does it appear and why?
4 Marks
1. Derive the Snell’s formula for Fermat
Principle.
2. What is meant by Total internal reflection
and derive the relation between critical
angle and total internal reflection?
3. Explain the experiment that showing the
relation between angle of incidence and
angle of refraction through the figure?
4. Explain the experiment that showing the
determination of position and nature of
image formed by a glass slab through the
figure?
3. What is optically denser medium?
A. The medium in which speed of light is less
is called optically denser medium.
4. Determine the refractive index of benzene
if the critical angle of it is 42º?
A. Critical angle of benzene (C) = 42º
n=
1
1
=
= 1.51
sin C sin 42 0
5. What is lateral shift?
A. Side wise shift when a ray of light is incident obliquely on a parallel sided glass
slab.
6. Name the colour of light for which critical
angle is minimum?
A. Violet.
7. What are applications of total internal
reflection?
A. Formation of mirages, brilliance of diamond, working of optical fibre.
8. Find the critical angle for a material of
refractive index √2?
1
1
⇒ SinC =
= C = 450
µ
2
When is angle of incidence is equal to the
angle of refraction?
When light travels perpendicular to surface it will not undergo any refraction. So
angle of incidence is equal to angle of
refraction.
What is the principle involved in the optical fibre?
Total internal reflection.
Define shift?
A. SinC =
9.
A.
10.
A.
11.
6. REFRACTION OF LIGHT
AT CURVED SURFACES
IMPORTANT QUESTIONS
1 Mark
1. Can a virtual image be photographed by a
Camera?
A. Yes a virtual image can be photographed
by a camera.
2. Give two uses of a convex lens?
A. (i) used in projectors
(ii) Cameras
3. Do only convex lens converge?
A. No, a concave mirror also converge.
4. What is positive lens?
A. Convex lens.
5. Define principal axis?
A. The line joining the centre of curvature
and the pole is called principal axis.
6. Write the lens formula?
A
scale for measuring hydrogen ion
concentration in a solution is clled PHscale. PH
value of a solution is simply
a number which indicates the acidic or
basic nature of a
solution.
4
1
v
A.  −
10th Class Special- Physical Science
1 1
= 
u f 
7. Write the lens makers formula?
A.
Hans Christian Oersted was one of the leading scientist of the
19th century, played a crucial role in understanding electromagnetism.
The unit of magnetic field strength is named Oersted in his honour.
Oersted was made a foreign member of the Royal Swedish Academy
of Sciences in 1822.
VýS$Æý‡$ÐéÆý‡… l íœ{ºÐ]lÇ l 18 l 2016
1
1
1
= (n − 1)  − 
f
 R1 R 2 
8. Which lens will form both real and virtual
images?
A. Plane mirror.
9. What is negative lens?
A. Concave lens.
10. Draw the plane-concave mirror?
2.
A.
3.
A.
4.
A.
A.
5.
A.
sities by the atom or molecule is called
scattering of light
Name of the part of the eye that controls
the amount of light entering into the eye?
Iris.
Define angle of vision? What is its value?
The maximum angle at which we are able
to see the where object is called angle of
vision. Angle of vision for healthy human
is 60º
Define least distance of distinct vision?
What is its value?
It is the least distance at which a person
can see an object comfortably and distinctly. Value is 25 cm.
What are rods?
Rods are the receptors which identify the
colour.
What is retina?
The retina is delicate membrane, which
acts as a screen, the eye lens formula a real
and inverted image of an object on the
retina.
What are cones?
Cones are the receptors identify the intensity of light.
Which colour is best for school buses?
Yellow (or) Orange.
What is an optic nerve?
Optic nerve is nerve which transmit the
light signals to the brain.
What type of lens used to correct myopia?
Bi concave.
State the role of ciliary muscles in accommodation?
It can adjust the focal length of the eye
lens.
What is the function of pupil in human
eye?
It allows the light falling on iris.
Write the formula of refractive index of
the prism?
2 Marks
1. Suppose you are inside the water in swimming pool near an edge. A friend is standing on the edge. Do you find your friend
taller or shorter than his usual height?
Why?
2. Preethi tells Sushant that the double convex lens behaves like a convergent lens.
But Sushant knows that Preethi assertion
is wrong and corrected Preethi by asking
some questions. What are the questions
asked by Sushant?
3. Draw a ray diagram for the following
positions and explain the nature and position of image i) Object is placed at C2
ii) Object is placed between F2 and optic
centre P?
4. A plane convex lens whose n=1.5 has a
curved surface of radius 15cm what is its
focal length? Why do you see a diminished image? How could this happen?
5. Write the steps involved in sign convention used in lenses?
6.
A.
4 Marks
1. Derive the formula of image formation in
refraction at curved surfaces?
2. Derive the lens formula?
3. Derive the lens maker’s formula?
4. Write the experimental method and apparatus required in finding out the image
formation using convex lens?
 A+D 
Sin 

 2 
A. µ =
A
Sin
2
7. HUMAN EYE AND
COLOURFUL WORLD
IMPORTANT QUESTIONS
1 Mark
1. Define scattering of light?
A. The process of re-emission of absorbed
light in all directions with different inten-
When light
travels from one
medium to another, its
direction changes at the
interface. The phenomenon
of changing direction
at the interface of
the two media is
known as
refraction.
7.
A.
8.
A.
9.
A.
10.
A.
11.
A.
12.
A.
13.
4 Marks
1. Derive the formula for refractive index of
a prism?
2. Write the different characteristics of red
colour and violet colours in dispersion of
light?
3. Explain briefly the reasons for the blue
colour of the sky?
4. Write the experimental procedure of finding the refractive index of a prism?
5. Explain the formation of rainbow with the
help of water drop diagram?
8. STRUCTURE OF ATOM
IMPORTANT QUESTIONS
1 Mark
1. What is electron spin.?
A. The rotation of electron about its own axis
is called electron spin.
2. Write four quantum numbers of 1s1 electrons.
A.
n
1
l
0
ml ms
0 +½
3. How many maximum number of electrons
that can be accommodated in ‘N’ principle
energy shell?
A. 32
4. How many sub shells present in a ‘M’
principle energy shell?
A. 3 (s,p,d)
4. Give the relation between c, υ and λ?
A. c = υλ
5. Write the four quantum numbers for the
differentiating electron of sodium (Na)?
A. n = 3, l = 0, m = 0, s = +½.or -½
6. What is the value of plank's constant?
A. 6.625×10-27 erg sec (or) 6.625×10-34 Js
7. What is spectrum?
A. A group of frequencies (or) wave length is
called spectrum.
8. Define Pauli exclusion principle?
A. No two electrons can have same four
quantum numbers.
9. Draw the shape of s-orbital?
14. Name the molecules responsible for blue
sky?
A. Nitrogen & oxygen molecules.
z
y
A.
2 Marks
1. How do you appreciate the eye donor?
2. Why sun appears during the noon?
3. Write the importance of graph in finding
the refractive index of prism?
4. How does an eye lens can accommodate
its focal length?
5. How do you appreciate the working of
“iris”?
6. Have you seen a rainbow in the sky after
rain? How is it formed?
7. Why the red signal is used for danger signals?
8. Why does the sky sometimes appear
white?
9. Glass is known to be transparent material
but ground glass is opaque and white in
colour why?
10. A person is viewing an extended objects.
If a converging lens is placed in front of
his eye, will he feel that the size of object
has increased. Why?
differentiating electrons of sodium atom?
(or) Write the four quantum for the
valence electron of sodium (Na) atom?
4. Write the four quantum numbers for 1s1
electron. (or) Write the four quantum
numbers for hydrogen atom?
(Spherical)
x
10. Who proposed Principle quantum number?
A. Niel’s Bohr.
11. What is Zeeman effect?
A. Splitting of spectral lines in presence of
magnetic field is called Zeeman effect.
12. Write the electronic configuration of
chromium?
A. 1s22s22p63s23p64s13d5
13. What is the shape of d-orbital?
A. Double dumbell.
2 Marks
1. Which electronic shell is at a higher energy level K or L ? Explain?
2. Which rule is violated in the electronic configuration 1s0 2s2 2p4? (or) The following electronic configuration does not support the Aufbau principle Why 1s0 2s2 2p4?
3. Write the four quantum numbers for the
5. Rainbow is an example for continuous
spectrum explain? or Define continuous
spectrum? Explain with one example?
4 Marks
1. What information does the electronic configuration of an atom provide?
2. What are the postulates of Bohr atomic
model? Write the defects in it?
3. In an atom the number of electrons in N.
Shell is equal to the number of electrons in
K and L and M shells. Answer the following questions?
(i) Which is the outer most shell?
(ii) How many electrons are there in its
outermost shell.
(iii)What is the atomic number.
(iv) Write the electronic configuration of
the elements.
4. How many elliptical orbits are added by
Sommerfeld in third Bohr’s orbit? What
was the purpose of adding these elliptical
orbits?
5. Explain the significance of three quantum
numbers in predicting the positions of an
electron in an atom?
9. CLASSIFICATION OF
ELEMENTS –
THE PERIODIC TABLE
IMPORTANT QUESTIONS
1 Mark
1. Write the Mendeleeff’s periodic law?
A. The physical and chemical properties of
elements are a periodic function of their
atomic weights.
2. What is valency?
A. Valency of an element was defined as the
combining power of an element with
respect to hydrogen.
3. Write the formula proposed by Milliken to
measure electro negativity?
A. E.N = I.E + E.A
2
Max Karl Ernst Ludwig Plank was a German theoretical physicist who
originated quantum theory, which won him the Nobel Prize in Physics in
1918. Plank made many contributions to theoretical physics, but his fame
rests primarily on his role an originator of the quantum theory? This theory revolutionized human understanding of atomic and subatomic processes.
4. Write the units of ionization energy?
A. ev (or) Kcal / mole (or) KJ/mole
5. Give any two examples of Dobereiner’s
traids?
A. Li, Na, K; S, Se,Te
6. Write the electronic configuration of
Transition elements?
A. ns2np6(n−1)d1−10
7. Write the Nobel gas elements?
A. He, Ne, Ar, Kr, Xe, Rn
8. Who is the father of periodic table?
A. Mendeleeff.
9. What are lanthanoids?
A. Elements from 58Ce to 71Lu are called
Lanthanoids.
10. Write the name of the element family of
16 group?
A. Chalcogen family.
11. What are actinoids?
A. Elements from 90Th to 103Lr are called
Actinoids.
2 Marks
1. An element has atomic number 19. Where
would you expect this element in the periodic table and why?
2. Name two elements you would expect to
have chemical reactions similar to Mg?
What is the basis for you choice?
3. An element has atomic number 29. Where
would you expect this element in the periodic table and why?
4. Explain New lands concept of octaves?
5. Second ionization energy of an element is
higher than its first ionization energy
why?
6. All alkali metals are solids but hydrogen is
a gas with di atomic molecules. Do you
justify the inclusion of Hydrogen in first
group with alkali metals?
7. Why Mendeleeff had to leave certain
blank spaces in his periodic table? What is
your explanation for this?
4 Marks
1. How do you appreciate the role of electronic configuration of the atoms of elements in periodic classification?
2. Explain how the elements are classified
into s, p, d, f in the Periodic table and give
the advantage of this kind of classifications?
3. What is a periodic property? How do the
following properties change in a group
and period? Explain?
(a) Atomic radius
(b) Ionization energy
(c) Electron affinity
(d) Electron egativity
4. What is Ionization energy? Explain the
factors affect the ionization energy?
5. What are the limitations of Mendeleeff’s
periodic table. How could the modern
periodic table over come the limitations of
Mendeleev’s table.
10. CHEMICAL BONDING
IMPORTANT QUESTIONS
1 Mark
1. The nobel element which is exception of
octet rule?
A. Helium
2. Give example for double bonded molecule?
A. O2, C2H4
3. Expand VSEPRT.
A. Valency Shell Electron Pair Repulsion
Theory.
4. Give example for non - polar solvents.
A. CCl4, Benzene, Kerosene.
5. Examples of triple bond molecules?
A. N2, C2H2, HCN
6. Example of FCC molecule?
A. NaCl
7. General electronic configuration of noble
gases?
A. ns2np6
8. What is the shape of Ammonia?
A. Pyramidal.
9. Who proposed valance bond theory?
A. Linus Pauling
2 Marks
1. How bond energies and bond lengths of
molecule helps us in predicting their
chemical properties? Explain with examples.
2. Draw the simple diagrams to show how
electrons are arranged in the following
covalent molecules?
a) Ammonia (NH3)
b) Methane (CH4)
3. Represent the lewis dot structure for the
following?
He, Kr, Ne, Xe, Ar, Rn.
4. Represent each of the following atoms
using lewis notation?
a) Berylium
b) Calcium
c) Lithium
5. Predict the reasons for low melting point
of covalent compounds when compared
with ionic compound?
6. Draw simple diagrams to show how electrons are arranged in the following covalent molecules?
a) Calcium oxide [CaO]
b) Water [H2O]
c) Chlorine [Cl2]
4 Marks
1. Write the properties and uses of covalent
compounds?
2. What is octet rule? How do you appreciate
role of the octet rule in explaining the
chemical properties of elements?
3. Explain what type bond is formed in
AlCl3?
4. Explain VSEPRT theory?
5. What is hybridization? Explain the formation of the following molecules using
hybridization?
(a) BeCl2
(b)BF3
11. ELECTRIC CURRENT
IMPORTANT QUESTIONS
1 Mark
1. Define Resistance?
A. Resistance is the opposition that a substance offers to the flow of electric current.
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10th Class Special- Physical Science
2. What is electric current? How do you
express it?
A. Electric current is expressed as the amount
of charge flowing through a particular area
in unit time.
q
I=
t
3. Write the relation between electric current, potential difference, electric power?
A. P = V x I
5
electric bulb an ammeter and plug key?
2. A student says potential difference and
emf are same justify your answer?
3. Why should we connect the electric appliances in parallel to household circuit?
4. Explain the working of multimeter?
5. Define ohmic and non- ohmic conductors
with examples?
6. What do you mean by electric shock?
Explain how it takes place?
7. Why do we use fuses in household circuits?
4 Marks
1. How can you verity that the resistance of
conductor is temperature dependent?
2. State Ohm’s law. Suggest an experiment
to verify it and explain the procedure?
3. What are the factors one which the resistance of conductor depends? Give the corresponding relation?
4. Derive the equation for resultant resistance of resistors in series combination?
12. ELECTROMAGNETISM
IMPORTANT QUESTIONS
4. When resistances are connected in series
which physical quantity remains
unchanged?
A. Current
5. What is the shape of V-I shape for a metallic wire?
A. A straight line passing through origin.
6. Draw the symbol of Resistor?
A.
7. Define Resistivity?
A. Resistivity of the material is the resistance
per unit length of a unit cross section of
the material.
8. Define ohmic conductors?
A. The materials which obeys ohm’s law are
called ohmic conductors.
9. Write the ohm’s law?
A. V=IR
10. What are the examples of non-ohmic conductors?
A. LED, Semiconductors.
11. Which material act as the best conductor?
A. Silver
12. A battery of 6v is applied across a resistance of 15Ω. Find the current flowing
through the circuit?
ν
6
A. I = = I = = 0.4amp
R
15
13. What do you mean by short circuit?
A. A sudden flow of a very large circuit due
to direct current of live and neutral wire is
called short circuit.
2 Marks
1. Draw a circuit diagram with a cell, an
1 Mark
1. List two source of magnetic fields?
A. Magnet, moving charges, electric current.
2. Which field has both strength and directions are constant?
A. Uniform magnetic field
3. Mention two uses of solenoid?
A. It is used in electric bells, fans and motors.
4. Name the long wire wound in a close
packed helix?
A. Solenoid
5. What is the unit of magnetic flux density?
A. Weber /mt2 (or) Tesla.
6. List two sources of magnetic fields?
A. Magnet, moving charges, electric current
7. What is Induced current?
A. The current produced by moving a straight
line in a magnetic field is called induced
current.
8. What are the imaginary lines that helps us
to understand the nature of the field?
A. Magnetic lines.
9. What happens when a coil without current
is made to rotate as a magnetic field?
A. Electricity is generated.
2 Marks
1. Explain the Faraday’s law of induction
with the help of an activity?
2. State the right hand thumb rule ? How the
rule help us?
3. How do you appreciate the variation
The arrangement of electrons in
shells, sub-shells and
orbitals in an atom is
called the electron configuration.
6
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10th Class Special- Physical Science
between magnetic field and electricity that
changed the life style of mankind?
4. Give a few application of Faraday’s law of
induction in daily life?
5. Which of the various methods of current
generation protects nature well. Give
examples to support your answer?
4 Marks
1. Write any four applications of Faraday
law of induction in daily life?
2. Describe an activity that shows the magnetic field exerts force on current carring
wire?
3. Explain different ways induced current in
a coils?
4. Explain the working of AC electric generator with a neat diagram?
5. Explain the working electric motor with
neat diagram?
13. PRINCIPLES OF
METALLURGY
IMPORTANT QUESTIONS
1 Mark
1. Give any two examples of ores with their
formula’s.
A. Cinnabar – HgS
Horn silver - AgCl
2. Define metallurgy.
A. Metallurgy is the process of extraction of
metals from their ores and preparation of
alloys.
3. What is corrosion?
A. Process of slowly coated with oxides (or)
other salts of the metal and forms thin layers.
4. Why is carbon not used for reducing aluminium from aluminium oxide?
A. The oxide of aluminium is very stable and
can be reduced by electrolytic process.
Modern
periodic law:
The physical and
chemical properties of
the elements are the
periodic functions
of their Atomic
configurations.
5. Mention two methods which produce very
pure metals?
A. Electrolytic reduction, smelting are two
methods which produce very pure metals.
6. Name two metals other than aluminium
which are obtained by electrolytic reduction?
A. Sodium and Magnesium.
7. What is poling?
A. The method of removing impurities either
for gases (or) liquids get them oxidized
and form slag over surface of molten
metal is called poling.
8. What is thermite process?
A. The exothermic reaction in which highly
reactive metals displaces low reactive
metals is used in thermite process.
9. Write the formula’s of Gypsum, plaster of
paris?
A. Gypsum: CaSO4. 2H2O, Plaster of Paris :
CaSO4.½H2O
10. What is calcination?
A. Calcination is a pyrochemical process in
which the ore is heated in the absence of
air.
11. What is froth flotation?
A. The impurities of the ore is wetted by producing froth in water is called froth flotation.
12. Write the names of any two ores of Fe?
A. Hematite: Fe2O3 Magnetite : Fe3O4
2 Marks
1. Show that both air and water are necessary
for corrosion of Iron?
2. Where do we use hand picking and washing methods in our daily life? Give examples?
3. Write a note on dressing of ore in metallurgy?
4. How do you extract the metals at the top
of the activities series?
6. What is difference between blast furnace
and reverberatory furnace?
7. Write short notes on froth floating
process?
8. Write any 4 examples of ores of sulphides?
4 Marks
1. Write the short notes on each of the following.
(a) Distillation
(b) Poling
(c) Liquation
(d) Electrolysis.
2. Suggest an experiment to prove that the
presence of air and water are essential for
corrosion. Explain the procedure.
3. Write a note on dressing of ore in metallurgy.
4. What is thermite process? Mention its
application in daily life
14. CARBON AND
ITS COMPOUNDS
IMPORTANT QUESTIONS
1 Mark
1. What is Pka?
A. Pka is the negative value of logarithm of
dissociation constant of an acid.
Pka = −log10 k
Wohler Friedrich.. German chemist who was a student of Berzelius.
In attempting to prepare ammonium cyanate from silver cyanide and
ammonium chloride, he accidentally synthesized urea in 1828. This
was the first organic synthesis, and shattered the vitalism theory.
2. What are nano tubes?
A. Nano tubes consists of hexagonal arrays
of covalently bonded carbon atoms similar
to the sheets of graphite.
3. Give an example for straight chain compound?
A. CH3–CH2–CH2–CH2–CH3 (n – pentane)
4. Name the carboxylic acid used as preservative?
A. Acetic acid is the carboxylic acid used as
a preservative.
5. What is soap?
A. Soap is a sodium or potassium salts of a
higher fatty acids like palmatic and stearic
and or oleic acid.
6. Nano tubes are discovered by which scientist?
A. Sumio Lijima.
7. Which allotropic form of carbon has foot
ball like structure?
A. Buck minister fullerene.
8. Which allotropic form of carbon has layered structure?
A. Graphite
9. What do we call the self linking property
of carbon?
A. Catenation
10. Name the product other than water formed
on burning of ethanol in air?
A. The product other than water formed on
burning of ethanol is carbondioxide.
11. What happens when a small piece of sodium is dropped into ethanol?
A. When a small piece of sodium is dropped
into ethanol bubbles of hydrogen gas is
produced.
12. What is meant by Rectified spirit?
A. 96% alcohol is called Rectified spirit.
13. What is the formula of Ethyl acetate?
A. CH3COOC2H5
2 Marks
1. Define Isomers? Write structural formula
of Isomers of butane?
2. Why we are advised not to use animal fats
for cooking?
3. Define homologous series of compounds.
Mention any two characteristics of homologous series?
4. Suggest a chemical test to distinguish
between ethanol and ethonoic acid and
explain procedure?
5. How do you appreciate the role of esters in
everyday life?
4 Marks
1. Explain the cleaning action of soaps?
2. Write the manufacturing of ethanol?
3. How can you support the artificial ripening of fruit by ethelene?
4. Write the characteristics of homologous
series of organic compounds?
5. Distinguish between esterification and
saponification reaction of organic compounds?
4. Complete the following reactions?
FILL IN THE
BLANKS
1. HEAT
1. Specific heat S = ____.
2. Boiling point of water is ____Cº
3. Latent heat of vaporization of water is
____.
4. The process of converting solid into liquid
is called ____.
5. The amount of a water vapour present in
air is called____.
6. ____is the reverse process of evaporation.
7. Evaporation is a ____ phenomenon.
8. Conservation of steam into liquid is called
____.
9. 1 Calorie = ____ joule
10. The temperature of a steel rod is 330K. Its
temperature ºC is ____.
11. ____ is used as a coolant.
12. Rate of evaporation depends on ____,
____, ____.
13. Latent heat of fusion for ice is ____.
14. S.I Unit of specific heat is ____.
ANSWERS
 Q 
1) 
; 2) 100; 3) 540 cal/gm;
 m∆T 
4) melting; 5) Humidity; 6) condensation;
7) cooling; 8) condensation; 9) 4.186;
10) 57ºC; 11) Water; 12) Surface Area,
Humidity, Temperature; 13)80 cal/gm;
14) J Kg-1k-1;
2. CHEMICAL REACTIONS
AND EQUATIONS
1. The reaction 2N2O → 2N2 + O2 is an
example for ____ reaction.
2. The decomposition of vegetables into
compost is an example of ____ reaction.
3. Rancidity is an ____ reaction.
4. CuO +H2 → Cu+H2O is ____ reaction.
5. By painting we can prevent ____.
6. Chemical formula of rust is ____.
7. Stainless steel is a mixture of Iron with
____and chromium.
8. Respiration is a ____reaction.
9. ____ chemical reaction is involved in the
corrosion of iron.
10. ____ reaction involved when silver chloride is exposed to sunlight.
11. Examples of Antioxidants are ____.
ANSWERS
1) Chemical decomposition; 2) Oxidation; 3) oxidation; 4) Redox reaction; 5)
corrosion; 6) Fe2O3.XH2O; 7) Carbon,
nickel; 8) exothermic; 9) Oxidation; 10)
Photo chemical reaction; 11) Vitamin C
and E.
conH SO
2 4
a ) CH 3CH 2OH 

→
Heat
b) CH3COOH+NaHCO3→
Sunlight
c ) CH 4 + Cl 2 
→
Ni
d ) CH 2 = CH 2 + H 2 
→
3. REFLECTION OF LIGHT
BY DIFFERENT SURFACES
1. Magnification produced by a convex mirror
is ____.
Linus Pauling.. The world's one of the greatest scientists and a
great humanist. He was acknowledged as the most influential
chemist. He is the only person ever to receive two unshared Nobel
Prizes- for Chemistry (1954) and for Peace (1962).
2. If magnification m is >1 than the size of
the image is ____.
3. The distance between pole and focus is
____.
4. Mirror formula is ____.
5. Light chooses the path which takes the
least time to travel. This is called____
principle.
6. The geometric centre of the mirror is
____.
7. A concave mirror can form a ____.
8. Convex and concave mirrors are known
collectively as ____.
9. We get a diminished image with a concave
mirror when the object is placed ____.
10. The drivers mirror used in automobiles is
____.
11. Virtual image cannot be received on a
____.
12. ____ mirrors are used in head lights of
vehicles.
ANSWERS
1) less than 1; 2) Big; 3) Focal length;
 1 1 1
= +  ; 5) Fermat; 6) pole;
 f u v
4) 
7) real (or) virtual image; 8) Spherical
mirror; 9) beyond C; 10) convex;
11) screen; 12) concave.
4. ACIDS, BASES AND SALTS
1. Range of pH scale ____.
2. During digestion stomach produces ____.
3. ____ medicine is used for treating indigestion.
4. Bleaching powder is represented by formula ____.
5. The acid forms in stomach is ____.
6. Many salts absorb water from atmosphere
this property is called ____.
7. If pH of rain water is less than 5.6 it is
called____.
8. Water soluble bases are known as ____.
9. The colour of Methyl orange indicator in
acidic medium is____.
10. The colour of phenolohthalein indicator in
Basic medium is ____.
11. Formula of plaster of Paris____.
12. ____is derived from tomato and turns blue
litmus to red.
ANSWERS
1) 1-14; 2) Hydrochloric acid; 3) Antacid;
4) CaOCl2; 5) HCl; 6) Crystallisation;
7) Acid rain; 8) Alkali; 9)Red; 10) pink;
11) CaSO4.½H2O; 12) Tartaric acid.
5. REFRACTION OF LIGHT
AT PLANE SURFACES
1. At critical angle of incidence, the angle of
refraction is ____
2. Light travelling along a Normal is ____
refracted
3. ____is the basic principle of optical fibre.
4. The unit of refractive index is ____.
5. The angle of refraction for critical angles
is ____.
6. The critical angle of diamond is ____.
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10th Class Special- Physical Science
7. Refractive index of glass is 3/2. Then the
speed of light in glass is ____.
8. n1sin i=n2sin r is called ____.
9. Speed of light in vacuum is ____.
10. Mirage is an example of ____.
11. A lemon kept in a glass of water appears to
be ____
12. Refractive index of water is ____.
ANSWERS
1) 90º; 2) 2.5 cms; 3) 2.27 cms; 4) concave; 5) convex; 6) 600; 7) accommodation; 8) Sir. C.V. Raman; 9) 25 cms; 10)
2.5 cms; 11) retina; 12) VIBGYOR, dispersion.
8. STRUCTURE OF ATOM
7
The shape of NH3 is ____.
1 nanometer ____Meter
Examples of Triple bond molecules ____
Ionic compounds dissolved in ____ solvents.
10. General electronic configuration of Noble
gas____.
11. The noble element which is exception of
octet rule____.
6.
7.
8.
9.
ANSWERS
1) 90º; 2) not; 3) Total internal reflection;
4) No units; 5) 90º; 6) 24.4º; 7) 2×108
m/sec; 8) Snell’s law; 9) 3×108 m/sec;
10) Total internal reflection; 11) Bigger;
12) 1.33.
6. REFRACTION OF LIGHT
AT CURVED SURFACES
1. S.I Unit of the power of a lens is____.
2. The power of a concave lens is____.
3. Focal length of a convex lens is ____
when it is kept in water.
4. Lens formula is given by____.
5. Lens maker formula is ____.
6. The distance between the principle focus
and optical centre of the lens is ____.
7. The power of a convex lens of focal length
50 cm= ____Dioptre.
8. When a ray of light passes from denser to
rarer medium it bends____to the normal.
9. The power of convex lens is____.
10. The ray from the distant object, falling on
the convex lens pass through____.
1. The orbitals which have same energy are
called ____.
2. The formula for no. of electrons in a shell
is ____.
3. The subshell of the orbital for l= 1 is ____.
4. ____is a group of wavelength.
5. Splitting of spectral lines due to magnetic
field is called____.
6. Splitting of spectral lines in the presence
of electric field is called____.
7. Stationary orbits are introduced by ____.
8. The electronic configurations of Cr is___.
9. The electronic configuration of cu(29)___.
10. Elliptical orbits are introduced by____.
11. The elements in which outermost orbitals
are completely filled are called____.
12. Short notation of electron configuration is
____.
ANSWERS
1) Degenerate orbitals; 2) 2n2; 3) p;
4) spectrum; 5) Zeeman effect; 6) stark
effect; 7) Niels Bohr; 8) [Ar]4s13d5; 9)
[(Ar)4s13d10]; 10) sommerfeld; 11) inert
gas; 12) nlx
ANSWERS
9. CLASSIFICATION OF
ELEMENTS –
THE PERIODIC TABLE
1) dioptre; 2) negative; 3) increases;
1
 1 1 
 1 1 1
= −  ; 5)  = (n − 1) −   ;
 R1 R 2  
 f v u
f
4) 
6) Focal length; 7) +½; 8) away; 9) positive; 10) focal point.
1.
2.
3.
4.
7. HUMAN EYE AND
COLOURFUL WORLD
5.
1. The intensity of light maximum at ____ in
scattering of light.
2. The distance between the eyes lens and
retina is about____.
3. The maximum focal length of the eye lens
is about____.
4. Myopia can be corrected by using ____
lens.
5. Hyper metropia can be corrected by using
____ lens.
6. Angle of vision for a healthy human is
____.
7. The process of adjusting focal length is
called ____.
8. ____explained the phenomenon of scattering of light in gages and liquids.
9. The value of least distance of distinct
vision is about____.
10. The distance between the eyes lens and
retina is about____.
11. The human eye forms the image of an
object____.
12. The splitting of white light into different
colour____is called____.
6.
7.
8.
9.
10.
11.
1A group elements are called ____.
Inner transition elements are called ____.
Father of periodic table____.
Atomic radius is measured in _________
units.
________ is the least electronegative element.
II A group elements are called____.
Noble gases belongs to ____ group of
periodic table.
____is the most electronegative element.
d block elements are also called ____.
Electro negativity is assigned by ____.
VIIA group elements are called ____.
ANSWERS
1) Alkalimetals; 2) ƒ Block elements;
3) Mendeleeff; 4) Aº; 5) cesium; 6) Alkali
earth metal; 7) 18th; 8) fluorine; 9) Transition elements; 10) Pauling; 11) Halogens.
10. CHEMICAL BONDING
1.
2.
3.
4.
5.
NaCl is said to possess ____.
Example for polar solvents is ____.
The shape of BeCl2 is ____.
Electro positivity is also called as ____.
Valence bond theory was proposed by
____.
ANSWERS
1) FCC Latric crystalline structure;
2) H2O; 3) Linear; 4) Metallic character;
5) Linus Pauling; 6) Pyramidal; 7) 10-9;
8) N2; 9) polar; 10) ns2np6;
11) Helium.
11. ELECTRIC CURRENT
1. 1KWH: ____ Joules
2. An electronic instrument is used in measuring electric current and electric resistance is ____.
3. Units of resistance____.
4. The surface of earth is taken to be at ____
potential.
5. Kirchoff’s loop law is based on the conservation of____.
6. Voltmeter is always connected in____ in a
circuit.
7. Units of specific resistant ____.
8. A thick wire has a ____ resistance than a
thin wire.
9. The Kilowatt hour is the unit of ____
10. The S.I Unit of potential difference is
____.
11. S.I unit of electric power is____.
ANSWERS
1) 3.6 x 105; 2) multimeter; 3) Ohm;
4) Zero; 5) energy; 6) parallel; 7) Ohmmeter; 8) less; 9) Electric energy;
10) Volt; 11) watt
12. ELECTROMAGNETISM
1. The magnetic force on a current carring
wire placed in uniform magnetic field of
the wire is oriented θ angle to magnetic
field is ____.
2. The magnetic force on a current carring
wire places in uniform magnetic field if
the wire is oriented parallel to magnetic
field is ____.
3. The device used for producing electric
current is called ____.
4. Unit of magnetic flux____.
The process of
re-emission of
absorbed light in all
directions with different
intensities by atoms
or molecules, is
called scattering of light.
8
Q. A sweet odour substance formed by the reactor
of an alcohol and a carboxylic and is?
A. Ester
VýS$Æý‡$ÐéÆý‡… l íœ{ºÐ]lÇ l 18 l 2016
10th Class Special- Physical Science
5. A metallic wire carrying an electric current is associated with it’s a____.
6. A current that flows in the same direction
is____.
7. The current that reverses its direction is
____current.
8. An electric motor is a device that converts
____ energy into ____ energy.
9. The S.I unit of magnetic field is____.
10. Faraday’s law of induction is the consequence of____.
11. Name the long wire wound in close
packed helix____.
ANSWERS
1) ILB sinθ; 2) 0; 3) Generator; 4) Weber.; 5) magnetic field; 6) direct; 7) alternate; 8) electric, Mechanical; 9) Tesla;
10) law of conservation of energy;
11) solenoid
13. PRINCIPLES OF
METALLURGY
1. Formula of pyrolusite ____.
2. Arrange Ag, Mg, K in activity series
____.
3. The purpose of smelting an ore is to ____
It.
4. The formula of rust ____.
5. Smelting is carried out in____furnace.
6. The new substance added to ore to remove
gangue is called____.
7. Aluminium is used as a reducing agent in
____ process.
8. Roasting is carried out in____furnace.
9. The impurity present in the ore is called as
____.
10. Galena is an ore of____.
11. ____ are least reactive elements.
12. Sulphide ores are concentrated by ____
process.
1. HEAT
1) MnO2; 2) K>Mg>Ag; 3) reduce;
4) Fe2O3XH2O; 5) Blast; 6) flux; 7) Thermite; 8) Reverberatory; 9) Gangue;
10) pb; 11) Au, Ag; 12) froth floatation
14. CARBON AND
ITS COMPOUNDS
1. The hydrocarbon that contain –OH group
are called ____
2. Allotropes forms due to the difference in
the ____
3. Soaps are the alkali salts of____.
4. Number of single covalent bonds in
ammonia are____.
5. Sodium lauryl sulphate is an example of
____.
6. A sweet odour substance formed by the
reactor of an alcohol and a carboxylic acid
MULTIPLE CHOICE QUESTIONS
1. Which of the following is a warming
process?
( )
a) Evaporation
b) condensation
c) boiling
d) all the above
2. The temperature of a steel rod is 330K. Its
temperature in ºC is?
( )
a) 55º C b) 57º C c) 59º C d) 53º C
3. Boiling point of water at normal atmospheric pressure is ?
( )
a) 0º C
b) 100º C c) 110º C d) -5º C
4. Specific heat S =?
( )
m∆T
Q
Q
a)
b) Q∆T c)
d)
Q
∆T
m∆T
5. When ice melts, its temperature?
( )
a) remains constant b) increases
c) decreases
d) cannot say
Answers: 1) b; 2) b; 3) b; 4) c; 5) a
2. CHEMICAL REACTIONS
AND EQUATIONS
a) v/u
b) u/v
c) ho/hi d) hi/ho
2. We get a diminished image with a concave
mirror when the object is placed?
( )
a) at F
b) between the pole and F
c) at C
d) beyond C
3. We get a virtual image in a concave mirror
when the object is placed ........... ? ( )
a) at F
b) between the pole and F
c) at C
d) beyond C
4. The equation of mirror formula is? ( )
1 1 1
1 1 1
a) = +
b) = −
f U V
f U V
c)
1
1
1 
= (n − 1)  −
 d) None
f
 R1 R 2 
5. Magnification produced by a concave mirror is?
( )
a) greater than 1
b) less than 1
c) equal to 1
d) all the above
Answers: 1) d; 2) c; 3) b; 4) a; 5) b
1. Corrosion is an ____ reaction?
( )
a) oxidation
b) reduction
c) redox
d) none of these
2. Fe2O3 + 2Al → Al2O3 + 2Fe. The above
reaction is an example of:?
( )
a) Combination reaction
b) Decomposition reaction
c) Displacement reaction
d) Double decomposition reaction
3. Precipitate in a reaction is indicated by
which arrow mark?
( )
a) →
b) ↑
c) ↓
d) ←
4. Calcium hydroxide is a ___solution? ( )
a) Acidic
b) Basic
c) Neutral
d) Amphoteric
5. Example of alloy
a) Brass
b) Bronze
c) Steel
d) All the above
1. The colour of phenolphthalein indicator in
basic solution is?
( )
a) yellow b) green c) Red
d) pink
2. Which one of the following types of medicines is used for treating indigestion? ( )
a) antibiotic
b) analgestic
c) antacid
d) antiseptic
( )
3. pH was introduced by?
a) Sorensen
b) Bohr
c) Lewis
d) Rutherford
( )
4. pH value of lemon juice is?
a) 4.2
b) 7.4
c) 2.5
d) 3.8
5. The colour of methyl orange indicator in
acidic medium is?
( )
a) yellow b) green c) red
d) pink
Answers: 1) a; 2) c; 3) c; 4) b; 5) d
Answers: 1) d; 2) c; 3) a; 4) c; 5) c
3. REFLECTION OF LIGHT
BY DIFFERENT SURFACES
5. REFRACTION OF LIGHT
AT PLANE SURFACES
1. Magnification m = ......................?
ANSWERS
( )
4. ACIDS, BASES AND SALTS
1. Which of the following is Snell's law?( )
a) n1 Sin i =
c)
Sinr
n2
n 2 Sin r
=
n1 Sin i
b)
n1 Sin r
=
n 2 Sin i
is____.
7. The first number of homologous series
among alkynes is____.
8. Commercially available ethanol is known
as____.
9. The reactive part of the organic molecule
is called its ____ group.
10. CnH2n is the general formula of ____.
11. Hydrocarbons having the general formula
CnH2n+2 are called____.
12. Carbon compounds containing double
bond and triple bonds are called ____.
ANSWERS
1) Alcohols; 2) arrangements atoms; 3)
Higher fatty acids); 4) Three; 5) Synthetic
detergent; 6) Ester; 7) C2H2; 8) rectified
spirit; 9) functional; 10)Alkene; 11) Alkanes; 12)Un-saturated compounds
formula?
1
1
1 
a) = (n − 1)  +

f
R
R
2 
 1
b)
1
1
1 
= (n + 1)  −

f
R
R
2 
 1
c)
1
1
1 
= (n − 1)  −

f
 R1 R 2 
d)
1
1
1 
= (n + 1)  +

f
R
R
2 
 1
d) n2Sin i = constant
2. The refractive index of glass with respect
to air is 2. Then the critical angle of glassair interface is?
( )
a) 0
b) 45º
c) 30º
d) 60º
3. Total internal reflection takes place when
the light ray travels from?
( )
a) rarer to denser medium
b) rarer to rarer medium
c) denser to rarer medium
d) denser to denser medium
4. The angle of deviation produced by the
glass slab is?
( )
a) 0º
b) 20º
c) 90º
d) depends on the angle formed by the
light ray and normal to the slab
5. Speed of light in vacuum is…. mt/sec?( )
b) 3 × 108
a) 2 × 108
4
c) 4 × 10
d) 2 × 1010
Answers: 1) b; 2) c; 3) c; 4) d; 5) b
6. REFRACTION OF LIGHT
AT CURVED SURFACES
1. When one of the following materials cannot be used to make a lens?
( )
a) water b) glass c) plastic d) clay
2. Focal length of the plano-convex lens is
........... when its radius of curvature of the
surface is R and n is the refractive index of
the lens?
( )
a) f = R
b) f = R/2
d) f = (n−1)/R
c) f = R/(n−1)
3. The value of the focal length of the lens is
equal to the value of the image distance
when the rays are?
( )
a) passing through the optic centre
b) parallel to the principal axis
c) passing through the focus
d) in all the cases
4. Which of the following is the lens maker's
( )
5. If the convex lens is placed in water its
focal length is?
( )
a) increases
b) decreases
c) remains constant
d) either increase or decrease
Answers: 1) d; 2) c; 3) b; 4) c; 5) a
7. HUMAN EYE AND
COLOURFUL WORLD
1. The focal length of −f shows……lens?( )
a) convex
b) concave
c) plano convex
d) all
2. The intensity of light is maximum at in
scattering of light?
( )
a) 0º
b) 90º
c) 30º
d) 60º
3. Myopia can be corrected by using .........
lens?
( )
a) convex
b) plano convex
c) concave
d) none
4. The splitting of white light into different
colours (VIBGYOR) is called?
( )
a) scattering
b) dispersion
c) refraction
d) reflection
5. During refraction, ___will not change?( )
a) wavelength
b) frequency
c) speed of light
d) all the above
Answers: 1) b; 2) b; 3) c; 4) b; 5) b
8. STRUCTURE OF ATOM
1. The maximum number of electrons that
can be accommodated in the L - shell of an
atom is?
( )
a) 2
b) 4
c) 8
d) 16
Q. Kirchoff’s junction law is based on conservation of?
a) mass b) energy c) power d) charge
A. d) charge
2. If l = 1 for an atom then the number of
orbitals in its sub-shell is?
( )
a) 1
b) 2
c) 3
d) 0
3. The quantum number which explains
about size and energy of the orbit or shell
is?
( )
d) ms
a) n
b) l
c) ml
4. The elliptical orbits are introduced by the
scientist……?
( )
a) Somerfield
b) Max Plank
c) Neil’s Bohr
d) Pauli
5. The electronic configuration of Cu is?( )
b) [Ar] 4s1 3d10
a) [Ar] 4s1 3d5
c) [Ar] 4s1 3d9
d) [Ar] 4s2 3d7
Answers: 1) c; 2) b; 3) a; 4) a; 5) b
9. CLASSIFICATION OF
ELEMENTS –
THE PERIODIC TABLE
1. 1 pico meter is …… mt?
( )
b) 10−12 c) 10−3
d) 10−8
a) 10−9
2. Number of elements present in period - 2
of the long form of periodic table?
( )
a) 2
b) 8
c) 18
d) 32
3. Which of the following is the most active
metal?
( )
a) Lithium
b) Sodium
c) Potassium
d) Rubidium
4. Electron configuration of an atom is 2, 8,
7 to which of the following elements
would it be chemically similar?
( )
a) Nitrogen (Z=7)
b) Fluorine (Z=9)
c) Phosphorous (Z=15)
d) Argon (Z=18)
5. Lithium, ................ and Potassium constitute a Dobereiner's triad?
( )
a) Sodium
b) Magnesium
c) Silicon
d) Iron
Answers: 1) b; 2) b; 3) d; 4) b; 5) a
10. CHEMICAL BONDING
1. Which of the following elements is electronegative?
( )
a) Sodium
b) Oxygen
c) Magnesium
d) Calcium
23
2. An element 11 X
forms an ionic compound with another element 'Y'. Then the
charge on the ion formed by X is?
( )
Important diagrams (5 Marks)
1. Heat:
Draw the diagram and label the parts to
prove that the rate of increase in temprature depends on the nature of substance.
2. Chemical reactions and equations:
Draw a neat diagram of representing
electrolysis of water.
Draw the diagram and label the parts
showing that the heating of Calcium
carbonate and testing the gas evolved?
3. Reflection of light by different surfaces:
Draw the ray diagram of reflection of
light in concave mirrors as an object
place at.
a) Beyond the centre of curvature (beyond
d) −2
a) +1
b) +2
c) −1
3. An element 'A' forms a chloride ACl4. The
number electrons in the valence shell of
'A'?
( )
a) 1
b) 2
c) 3
d) 4
4) Which one is polar compound?
( )
d) CH4
a) CCl4 b) NH3 c) H2O
5. The shape of BeCl2 is?
( )
a) Tetrahedral
b) Trigonal bipyramid
c) Linear
d) None
Answers: 1) b; 2) a; 3) d; 4) c; 5) c
11. ELECTRIC CURRENT
1. Units of specific resistance?
( )
a) ohm
b) ohm-meter
c) ohm/meter
d) volt
2. Joule/ coulomb is the same as?
( )
a) watt
b) volt
c) ampere d) ohm
3. Kirchoff’s junction law is based of conservation of?
( )
a) mass
b) energy
c) power
d) charge
4. Kirchoff’s loop law is based on the conservation of ……?
( )
a) mass b) energy c) power d
)
charge
5. Units of resistance?
( )
a) ohm
b) volt
c) coulomb
d) watt
Answers: 1) b; 2) b; 3) d; 4) b; 5) a
12. ELECTROMAGNETISM
1. Which converts electrical energy into
mechanical energy?
( )
a) motor
b) battery
c) generator
d) switch
2. Which converts mechanical energy into
electrical energy?
( )
a) motor
b) battery
c) generator
d) switch
3. The magnetic effect of current was discovered by?
( )
a) Faraday
b) Henry
c) Oersted
d) Maxwell
4. The SI unit of magnetic field induction is?
( )
a) Tesla
b) Ampere
C)
b) At centre of curvature.
c) In between focus point and centre of
curvature (between F-C).
d) At Focus point.
e) In between pole of the mirror and focus
point (between P-F)
Draw the ray diagram showing point
object (O) (or) Draw the ray diagram
showing an object (OO’) by a plane
mirror?
4. Acids, Bases and Salts:
Draw a neat diagram showing and solution in water conducts electricity and
also label in the diagram.
6. Refraction of Light at Curved Surfaces:
Draw the ray diagrams when the incident ray passes through the curved sur-
VýS$Æý‡$ÐéÆý‡… l íœ{ºÐ]lÇ l 18 l 2016
9
10th Class Special- Physical Science
c) Volt
5. Magnetic flux is the
field induction and?
a) length
c) volume
d) Ohm
product of magnetic
( )
b) area
d) width
Answers: 1) a; 2) c; 3) c; 4) a; 5) b
13. PRINCIPLES OF
METALLURGY
1. Galena is an ore of ?
( )
a) Zn
b) Pb
c) Hg
d) Al
2. The reducing agent in thermite process is?
( )
a) Al
b) Mg
c) Fe
d) Si
3. The oil used in the froth floatation process
is?
( )
a) kerosene oil
b) pine oil
c) coconut oil
d) olive oil
4. Froth floatation method is used for the
purification of _____ ore?
( )
a) sulphide
b) oxide
c) carbonate
d) nitrate
5. The impurity present in the ore is called as
____?
( )
a) Gangue
b) Flux
c) Slag
d) Mineral
Answers: 1) b; 2) a; 3) b; 4) a; 5) a
14. CARBON AND
ITS COMPOUNDS
1. The suffix used for naming an aldehyde
is?
( )
a) -ol
b) -al
c) -one
d) -ene
( )
2. CnH2n is the general formula of?
a) Alkane
b) Alkene
c) Alkyne
d) Alkyl
3. The valency of carbon is?
( )
a) 1
b) 2
c) 3
4) 4
4. Bond angle of methane is?
( )
a) 107º
b) 109º.281
c) 120º
d) 180º
5. Which allotropic form of carbon has layered structure?
( )
a) Graphite
b) Diamond
d) all
c) C60
Answers: 1) b; 2) b; 3) d; 4) b; 5) a
faces.
a) Rarer medium to denser medium
b) Denser medium to rarer medium.
7. Human Eye and Colourful world:
Draw the structure of human eye and
explain its parts.
8. Structure of Atom:
Draw the shapes of s, p, d orbitals.
Draw the diagram of electromagnetic
waves and label the parts.
Draw the diagram of Moeller chart.
12. Electromagnetism:
Draw the diagram of AC electric generator and label its parts.
Draw the diagram of DC electric generator and label its parts.
Draw the diagram of electric motor and
label its parts.
MATCHING
Column -I
a) Plaster of Paris
b) Gypsum
c) Bleaching
powder
d) Banking soda
e) Washing soda
Column - II
[d] a) CaOCl2
[e] b) NaHCO3
[a] c) Na2CO3
[b] d) CaSO4 ½ H2O
[c] e) CaSO4. 2H2O
Molecule
1) CH4
2) NH3
3) H2O
4) CO2
5) Bcl3
[c]
[d]
[e]
[a]
[b]
Column -I
a) Bauxite
b) Cinnabar
c) Limestone
d) Epsom salt
e) Haematite
[f]
[e]
[d]
[c]
[a]
Bond angles
a) 180º
b) 120º
c) 109º 281
d) 107º
e) 104º.51
Column - II
a) Fe2O3
b) CaSO2.½H2O
c) MgSO4.7H2O
d) CaCO3
e) HgS
f) Al2O3.2H2O
Column -I
1) Alcohol
2) Aldehyde
3) Ketone
[c]
Column - II
O
||
a) −C −
[d]
[a]
O
||
b) −C − OH
c) −OH
4) Carboxylic acid [b]
O
||
d) −C − H
5) Ester
O
||
e) −C − O −
Column -I
a) CH4
b) C2H4
c) C2H2
d) CH3COOH
e) CH3CH2OH
[e]
[d]
[e]
[b]
[c]
[a]
Column - II
1) Ethanol
2) Ethyne
3) Ethanoic acid
4) Methane
5) Ethene
Draw the diagram of magnetic field
lines when current passes through the
solenoid and label its parts.
13. Principles of Metallurgy:
Draw the diagram of magnetic seperator for enrichment of the ore and label
its parts.
Draw a neat diagram of reverberatory
furnace and label its parts.
Draw a neat diagram of Blast furnace
and label its parts.
Draw the diagram showing Froth
floatation and label its parts.
14. Carbon and its compounds:
Draw the diagrams of Diamond and
Graphite, label the parts.
Draw the electronic dot structure of
ethane molecule.
10
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◆
VýS$Æý‡$ÐéÆý‡… l íœ{ºÐ]lÇ l 18 l 2016
10th Class Special- Physical Science
◆
Special properties of carbon
Carbon - Hybridisation: - Sp Hybridisation - Sp2
Hybridisation - Sp3 Hybridisation.
Preparation and properties of carbon compounds
Chapter Wise Key Concepts
1
Heat
Heat
Temperature
Thermal equilibrium
Specific heat:- Factors effecting specific
heat - Applications of specific heat capacity in our daily lilfe. - To find the specific
heat of solids and liquids.
Method of mixtures
Evaporation
Condensation
◆ Fog and dew
Humidity
◆ Melting
Boiling
Latent heat of vaporization
Latent heat of fusion
Freezing.
◆
◆
◆
◆
◆
◆
◆
◆
◆
◆
◆
◆
2
Chemical reactions
and equations
5
Refraction
Rarer and denser media
Refractive index
Relative refractive index
Snells law
Total internal reflection
◆
◆
◆
◆
◆
◆
6
◆
◆
◆
Curved serface: - Concave surface - Convex surface
Refraction of light at concave and convex
surfaces
Refraction of light through denser to rarer
and rarer to denser at curved surfaces and
thier ray diagrams.
Lonses
Formation of images through convexlens
and thier ray diagrams
Lens formula and lens makers formula.
◆
◆
◆
◆
◆
Least distance and distant vision
Angle of illusion
General defects of vision
power of lens
Daily life applications of scattering of light
◆
◆
◆
◆
Reflection of light by
different surfaces
Human eye and colourful world
10 Chemical Bonding
Structure of atom
Why do atoms combine
Lewis electron dot structure
Valency electron theory ◆ Ionic bond
Formation of NaCl, MgCl2, Na2O and
AlCl3 molecules.
Valence shell electron pair repulsion theory (VSEPRT)
Bond angle according to VSEPRT.
Hybridization.
Formation of BeCl2, BF3, NH3 and H2O
molecules by hybridization.
Differences between ionic and covalent
substances
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Reflection of light
Laws of reflection
Formation of image and its characteristics
through a plane mirror.
Spherical mirrors:- Concave mirrors Convex mirrors.
Formation of image and its characteristics
through a concave mirror
Rules for drawing ray diagrams
Rules for drawing ray diagrams
Mirrors formula
Sign convention to be followed while
using mirror formula.
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Acids, Bases and salts
Reactions of acids, and bases with indicators.
Chemical reactions of acids and bases: Reaction with metals - Reaction with
metal carbonates and metal hydrogen carbonates.
Neutralization
Propertus of acids
Propertus of bases
PH value and PH scale
PH in our daily life
Salts:- Sodium chloride - Soduium hydroxide - Bleaching powder - Sodium Carbonate - Sodium bi carbonate - Plaster of
paris.
Water of crystalization.
Spectrum
Wave nature of light
Electromagnetic spectrum
Bohr's model of hydrogen atom and its
limitations.
Quantum mechanical model of atom.
Quantum numbers:- Principal quantum
number - Angular momentum qunatum
number.
Magnetic quatum number.
Spin quantum number.
Electronic configuration:- Aufbau rule Hund's rule - Pauli's exclusion - Principle.
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Electromagnetism - Oersted's experiment
Magnetic field
13
Magnetic flux
Magnetic flux density
Magnetic lines of force
Magnetic field due to electric current
Magnetic field due to staraight wire carrying current.
Magnetic field due to circular coil
Magnetic field due to solenoid
Magnetic force on moving charge and current carrying wire
Electric motor
Electromagnetic induction - Faraday's
laws
Induced emf - Lenz's law
Applications of electromagnetic induction
Generator.
14
Electromagnetism
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Carbon and its Compounds
Special properties of carbon
Carbon - Hypridisation: - Sp Hybridisation - Sp2 Hybridisation - Sp3 Hybridisation.
Allotropes of carbon:- Diamond - Graphite - Buckminister pullerin - Nano tubes
Nature of carbon:- Catanation - Allotropy
- Formation of multiple bands
Hydrocarbons: - Saturated Hydrocarbons
- Alkanes - Unsaturated Hydro carbons Alkens - Alkynes
Functional groups
Nomen Nomeclature of carbon compounds
Chemical properties of carbon compounds
Combustion reactions, oxidetion reactions, addition reactions, substitution reactions
Preparation and properties of carbon compounds - Ethanol Ethanoic acid
Esterification
Soaps, saponification.
Principles of Metallurgy
Ore
Concentration of ore
Classification of elements
the periodic table
Necessity of classifications
Dobereiner triads
Newlands law of octaves
Mendeleev's classification:- postulates Limitations
Modern periodic table (Long form periodic table)
Arrangement of elements in groups and
periods.
Properties of elements and their trends in
groups and periods.
Valence
Atomic radius
Ionization energy
Electron affinity
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12
by
Extraction of crude metal from the ore
metals of high reactivity
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Electric current
Electric current (Lorenz - Drude theory)
Potential difference
Working of a battery
Electromotive force (emf)
Relation between current and potential
difference - ohm's law
Electric shock
Resistance
Factors influencing resistance of a substance
Electric circuit
Series combination of resistors
Parallel combinatio of resistors
Kirchoff laws:- Junction law - Loop law
Electric power
House hold electric consumption, overload, use of fuse.
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Reflection of light
at Curved surfaces
Electronegativity.
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Chemical equations:- Writing a chemical
equation - Balancing a chemical equation
- Other information given by a chemical
reaction.
Chemical reactions:- Chemical combination - Chemical decomposition - Displacement - Double displacement.
Oxidation & Reduction
Oxidation in daily life, Rancidity
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Refraction of light at plane surfaces
Halides
Oxides
Metals of medium reactivity
Carbonate ore
Sulphide ore
Calcination
Roasting
Hand picking
Washing
Froth flotation
Magnetic Separation
Metals of low reactivity
Sulphide ore
Roasting
Electrolysis of molten ore
Metal
(eg: Na, Mg, Al,etc.,)
Chemical Reduction
Auto Reduction
Displacement Method
Elecrolytic reduction
Oxides
Reduction
Oxide of metal
Metal
Reduction of metal
Refinig (eg.Ag)
Refining of metal
Distillation
(eg: Cu, Zn, etc.,)
Poling
Liquation
Electrolytic refining
VýS$Æý‡$ÐéÆý‡… l íœ{ºÐ]lÇ l 18 l 2016
What are the postulates of Bohr atomic
model? Write the defects on it?
10th Class Special- Physical Science
11
General Science-1 Model Paper
ers while answering the multiple choice questions.
iv. Marks will not be awarded in case of
any overwriting, rewriting or arased answers.
General Science - Paper-1
(English Version)
Time 21/2 Hours
14.
Max. Marks: 50
Note:
Answers the following questions in the
space provided and attach it to the main
answer book of Part-A.
20 × ½ = 10 M
i. Write the 'Capital Letters' showing the
correct answer for the following questions
in the brackets provided against them.
Part - A&B
Instructions:
i. Answer the question under Part-A on a
separate answer book.
ii. Write the answer to the questions under
Part-B on the question paper itself and
attach it to answer book of Part-A.
Part - A
Time 2 Hours
Max. Marks: 35
Note: Use a seperate answer book to answer
the question in this part.
SECTION-I
Note:
i. Answer Any Five questions choosing
atleast Two from each group.
ii. Each question carries Two mark
5×2=10M
Group-A
1. Write the differences between evaporation
and boiling.
2. Explain the formation of mirages.
3. Frame some questions that you are going
to ask your friend who is suffering from
eye sight.
4. State the faraday's law of electromagnetic
induction. Write the equation of this law.
Group-B
5. Plaster of paries should be stored in moisture proof container. Why.
6. Which rule is violated in the electronic
configuration of 1so 2s2 2p4.
7. Do you think that newland's law of
octaves is correct? Justify.
8. How do you appreciate the role of esters in
everyday life.
SECTION-II
Note:
i. Answer Any four question from the following.
ii. Each question carries One mark.
4×1=4M
9. What should happen if we increase the
size of the hole of the pinhole camera.
10. Define the power of lens? What is its
units.
11. Why we use fuses in house hold circuits.
12. Give any two examples of olfactory indicator.
13. Second ionization energy of an element is
higher than its first ionization energy.
Why.
14. Define Roasting.
SECTION-III
Note:
i. Answer Any four question, choosing
atleast Two from each group.
ii. Each question carries four marks.
4×4=16M
Group-A
15. Determination of specific heat of solids
experimentally and write the precautionary measures.
16. Explain briefly the reason for the blue of
the sky.
17. Derive the equation for resultant resistance of resistors in series combination.
18. Write any four applications of faraday's
law of induction in daily life
Group-B
19. What are the postulates of Bohr atomic
model? Write the defects on it?
20. What is hybridisation? Explain the formation of the following molecules using
hybridisation
b) BF3
a) BeCl2
21. Where do we use hand picking and washing methods in our daily life. Give examples. How do you correlate these examples
with enrichment ore.
22. Write the characteristics of homologous
series of organic compounds.
SECTION-IV
Note:
i. Answer one of the following questions
ii. Each question carries five marks.
1×5=5M
23. Draw Suitable rays by which we can guess
the Position of the Image Formed by a
cancave Mirror.
24. Draw a heat diagram representing electrolysis of water and label the parts
Part - B
Instructions:
i. Answer all the questions.
ii. Each question carries 1/2 mark.
iii. Candidates must use the Capital Lett-
1. Which one of the following is a warming
process
[ ]
a) Evaporation
b) Condensation
c) Boiling
d) All the above
2. We get a virtual image in a concave mirror
when the object is placed.
[ ]
a) At F
b) Between pole and F
c) At c
d) beyond c
3. Speed of light in vaccum is ...mt /sec [ ]
b) 3×108
a) 2×108
c) 4×104
d) 2×1010
4. The refractive index of glass with respect
to air is 2. Then the critical angle of glass
- air interface is
[ ]
c) 30o
d) 60o
a) 0 b) 45o
5. If the convex lens is placed in water its
focal length is
[ ]
a) Increases
b) Decreases
c) Remains constant
d) Either increase or decrease
6. Which of the following is the lens maker's
formulae
[ ]
a)
 1
1
1 
= (n − 1) 
+

f
 R1 R 2 
b)
 1
1
1 
= (n + 1) 
+

f
R
R
2 
 1
c)
 1
1
1 
= (n − 1) 
−

f
 R1 R 2 
d) None of these
7. Myopia can be corrected by using...lens [ ]
a) Convex
b) Plano-convex
c) Concave
d) All the above
8. Units of specific resistance
[ ]
a) Ohm
b) Ohm-meter
c) Ohm/meter d) Volt
9. Which converts electrical energy into
mechanical energy
[ ]
a) Motor
(b) battery
(c) Generator (d) Switch
10. Magnetic flux is the product of magnetic
field induction and –––
[ ]
a) Length
b) Area
c) Volume
d) Width
11. Corrosion is an ... reaction.
[ ]
a) Oxidation b) Reduction
c) Redox
d) None of these
12. The colour of phenolphthalein indicator in
basic solution is.
[ ]
a) Yellow
b) Green
c) Red
d) Pink
13. The elliptical orbits are introduced by the
15.
16.
17.
18.
19.
20.
scientist
[ ]
a) Sommerfeld b) Maxplank
c) Neil's bohr d) Pauli
Which of the following is the most active
metal
[ ]
a) Lithium
b) Sodium
c) Potassium d) Rubidium
[ ]
The shape of Becl2 is.
a) Tetrahydral b) Trigonal bipyremid
c) Linear
d) Hexagonal
1 nanometer is ... mt
[ ]
b) 10–8
a) 10–6 b) 10–12 c) 10–9
Galena is an ore of
[ ]
a) Zn
b) Pb
c) Hg
d) Al
Froth floatation method is used for the
purification of ... ore.
[ ]
a) Sulphide
b) Oxide
c) Carbonate d) Nitrate
The suffix used for naming an aldehyde is
a) –ol
b) –al
c) –one
d) –ene
Which Allotrope form of carbon has layered structured
[ ]
a) Graphite
b) Diamond
d) All the above
c) C60
5 × ½ = 2½ M
i. Fill in the Blanks
Latent heat of fusion for ice is .. cal/gm.
... is the basic principle of optical fibre.
n1 sin i = n2 sin r is called...
A thick wire has a .. resistance then a thin
wire.
25. Faraday's law of induction is the consequnces of ....
III. Match the following:
By writing the letter of the correct answer
in the brackets, choosing from the group B.
5 × ½ = 2½ M
A
B
26. Plaster of paris [ ] a) CaOCl2
27. Bleaching powder[ ] b) NaHCO3
28. Baking soda
[ ] c) Na2CO3
29. Washing soda
[ ] d) CaSO4. 2H2O
30. Gypsum
[ ] e) Fe2O3 × H2O
f) CaSO4.1/2 H2O
21.
22.
23.
24.
ANSWERS
1) b 2) b 3) b
4) c
5) a
7) c
8) b 9) a
10) b 11) a
13) a 14) d 15) c 16) c 17) b
19) b 20) a 21) 80 cal/gr
22) Total internal reflection
23) Snell's Law
24) Less
25) Law of Conservation of Energy
26) f 27) a 28) b
29) c
6) c
12) d
18) a
30) d
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VýS$Æý‡$ÐéÆý‡… l íœ{ºÐ]lÇ l 18 l 2016
12
Career Counselling
KEY POINTS
Different Solutions
pH Values
Solution
HCl
NaOH
Distilled water
Lemonjuice
Coffee
Carrot Juice
Soda Water
Tomato Juice
Saliva (before meal)
Saliva (after meal)
pH value
1
13-14
7
2.5
5
4
6
4.1
7.4
5.8
USES
Calorimeter: Determination of specific heat of substance.
Thermometer: Determination of
Temperature
Prism: Observation of Angle of
Dispersion.
pH paper: Observation of Acid –
Base Strength.
Bleaching powder: Used as decolorizing agent, oxidant, used in
preparation of chloroform, used in
chlorination process.
Baking Soda: Manufacture of
cakes, preparation of Antacid,
preparation of Anti septic.
Washing Soda: Used in Glass, soap,
paper industry preparation of borax,
used to removal of hardness of
water.
Galvanometer: Determination of
electric current.
Electric motor: Convert the electric
energy to mechanical energy.
Dynamo: Convert the mechanical
energy to electric energy
Blast furnace: used to smelting
process.
Voltmeter: Determine the potential
difference.
Substance
Bauxite
Faraday: Laws of electrolysis.
Maxwell: Electron magnetic theory
J.J. Thomson: Watermelon model.
Rutherford: Planetory Model
Einstein: Laws of mass equivalence
Sommerfeld: Elliptical orbit model
Schrodinger: Wave equation
Maxplank: Quantum theory
Neils Bohr:
Principle Quantum number
Ulenbeck & Goudsmith:
Spin Quantum number
Dobereiner: Triad Theory
Sorensen: pH Scale
Newlands: Octave theory
Sumio Lijima: Nanotubes
: Formula
: Al2O32H2O
Epsum salt
: MgSO47H2O
Sinnabar
Magnetite
: HgS
: Fe3O4
Galena
Carnalite
: PbS
: KClMgCl26H2O
Gypsum
: CaSO4 2H2O
Pyrotusite
: MnO2
Hypo
: Na2S2O32H2O
Bleaching powder
: CaOCl2
Plaster of Paris
: CaSO4½H2O
Ethanol
: C2H5OH
Ethyl Acetate
: CH3COOC2H5
Soap
: C17H35COONa
Zincite
Lime stone
: ZnO
: CaCO3
Horn silver
Zinc Blende
Rock Salt
Hematite
: AgCl
: ZnS
: NaCl
: Fe2O3
Specific heat: cal/g.cº (or) J/Kg-k.
Latent heat of fusion: Cal/gm(or) J/k.g
Power of lens: dioptres
Electric current: Ampere
Specific resistivity: Ohm-mt
Electric energy: KWH
Atomic Radius: Angstrom Unit (Aº)
Ionization potential: Electron Volt.
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PHYSICAL
CONSTANTS – VALUES
Specific heat of lead:
0.031Cal/g-Cº;130 J/Kg - k
Specific heat of Mercury:
0.033Cal/g-Cº; 139 J/Kg – k
Latent heat of Vaporization:
540 Cal /gm
Latent heat of fusion: 80 Cal / gm
Refractive Index of Diamond: 2.42
Refractive Index of Benzene: 1.50
Refractive Index of Quartz: 1.46
ELECTRONIC
CONFIGURATION
1s22s22p63s1
Sodium (11):
Potassium (19): 1s22s22p63s23p64s1
Calcium (20): 1s22s22p63s23p64s2
Iron (26): 1s22s22p63s23p64s23d6
Chromium(24): 1s22s22p63s23p64s13d5
Copper (29): 1s22s22p63s23p64s13d10
Phosphrous (15): 1s22s22p63s23p3
Nickel (28): 1s22s22p63s23p64s23d8
Sulphur (16): 1s22s22p63s23p4
Zinc (30): 1s22s22p63s23p64s23d10
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Ððl»Œæ-OòÜsŒæ: www.imt.edu
Ððl»Œæ-OòÜsŒæ: www.andhrauniversity.edu.in
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D&-Ððl$-Ƈ¬ÌŒæ : sakshieducation@gmail.com
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