Q.1 Choose the correct. [Marks : 50]

Standard : 10 : SCIENCE [ lesson – 7 Acid Base of Salts ]
Q.1 Choose the correct. [Marks : 50]
(1) Which is basic from the following ?
(a) pH = 10
(b) pH = 5
(c) pH = 4
(d) pH = 7
(2) pH value of an aqueous solution is 6, then hat is it pOH value ?
(a) 11
(b) 9
(c) 8
(d) 10
(3) Who proposed proton exchange theory ?
(a) Lwuis
(b) Arrhenius
(c) Robert Boyle
(d) Lowry-Bronsted
(4) Which solution will be most acidic ?
(a) pH = 6
(b) pH = 5
(c) pH = 3
(d) pH = 2
(5) What is called number of gram moles of a substance present in one litre of solution ?
(a) Molality
(b) Formality
(c) Normality
(d) Molarity
(6) Who proposed proton exchange theory ?
(a) Lewis
(b) Arrhenius
(c) Robert Boyle
(d) Lowary-Bronsted
(7) Which gas can be prepared by Haber's process ?
(a) Nitrogen
(b) Oxygen
(c) ydrogen
(d) Ammonia
(8) How much weight of NaOH is needed to make 1 litre solution of 0.1 M NaOh ?
(a) 16 gm
(b) 8.0 gm
(c) 4.0 gm
(d) 12 gm
(9) Who gave operational definition of acid-base ?
(a) Sorenson
(b) Robert Boyle
(c) Lewis
(d) Arrhenius
(10) Which reaction is endothermic ?
(a) Dissolution of slaked lime in water
(b) Dissolution of concentrated sulphuric acid in water
(c) Dissolution of sodium nitrate in water.
(d) Neutralisation reaction between strong acid and
(11) Acid-base theory of which scientist can be said a universal theory ?
(a) Lewis
(b) Arrhenius
(c) Lowry-Bronsted
(d) None of these
(12) What is the 1 pH value of Human blood ?
(a) 7.4
(b) 7.9
(c) 7.0
(d) 5.0
(13) What would be the concentration of solution, if 1 mole NaOH is dissolved to prepare 500 ml aqueous solution
(a) 4 M
(b) 2 M
(c) 1 M
(d) 0.5 M
(14) What is the taste of an acid ?
(a) Bitter
(b) Sour
(c) Tasteless
(d) Sweet
(15) Which substance is formed when magnesium wire is burnt in oxygen ?
(a) Magnesium oxide
(b) Magnesium carbide
(c) Magnesium Boride
(16) What is the pH of blood ?
(a) none
(b) 7.0
(c) more than 7
(d) less than 7
(17) What will be the nature of aqueous solution having pOH = 4 ?
(d) Magnesium Nitride
(a) Acidic
(b) Neutral
(c) Basic
(d) None of these
(18) Which of the following does not get ionised completely ?
(a) None of these
(b) Strong acid
(c) Weak acid
(d) Strong base
(19) Who suggested the pH scale ?
(a) Sorenson
(b) Charles
20. Vinegar contains which acid?
a) tartaric acid
b) acetic acid
c) Avogedro
c) citric acid
(d) Boyle
d) oxalic acid
21. Which byproduct gas is released when an acid reacts with metal?
a) dioxygen
b) dehydrogen
c) dichlorine
d) dinitrogen
22. According to Arrhenius , which ion is released from a substance so that it becomes Arrhenius base?
a) H+
b) OH c) N3 d) O2 23. In H3 O+, there is coordinate covalent bond between ________ and _____
a) H2 and H3O+
b) H+ and H2O
c) H2 and H2O
d) H+ and H3O+
24. According to Bronsted – Lowry theory, the substance which accepts a proton (H+) from other substance is
called ____
a) acid
b) base
c) neutral solution
d) phenolic solution
25. Which of the following compounds is a base even through it does not produce OH- ion?
a) NaOH
b) Ca(OH)2
c) HCI
d) NH3
26. What type of substance is NH3?
a) Strong acid
b) weak acid
c) strong base
d) weak base
27. What is formed by reaction of non metal oxide with water?
a) acid
b) base
c) salt
d) metal
28. Acid + Metal oxide with water?
a) Base + Water
b) salt + water
d) metal + salt
c) base + salt
29. What is the byproduct obtained along with salt during neutralization between acid and base?
a) dinitrogen
b) water
c) dihydrogen gas
d) dioxygen gas
30. Which gas is produced by the reaction of base with some metals?
a) carbon dioxide b) dioxygen
d) dihydrogen
d) dinitrogen
31. What is the molecular formula of sodium zincate?
a) NaZn(OH)3
b) NaZn(OH)4
c) Na2Zn(OH)4
d) NaZnOH
32. What is the molecular formula of potassium aluminate?
a) K2AL(OH)3
b) K2AL(OH)4
c) KAL(OH)3
d) KAL(OH)4
33. 500 ml aqueous solution is prepared by dissolving 2 moles of HCL in water. What will be the molarity of this
a) 1
b) 2
c) 3
d) 4
34. What will be the molarity in mole / litre of 4.9 gram H2SO4 dissolved in 2.5 litre solution?
a) 0.002
b) 0.02
c) 0.2
d) 2
35. If 2 M solution having 98 grams solute is dissolved in 500 ml solution, what will be its molecular mass in
a) 4. 9
b) 49
c) 9.8
d) 98
36. What is correct form acidic aqueous solution?
a) [H3O+] = 10 -7 M
b) [H3O+] < 10 -7 M
c) [H3O+] > 10 -7 M
d) [H3O+] < [OH-]
37. Which of the following solutions is most basic?
a) pH = 8.2
b) pH = 9.3
c) pH = 11.5
d) pH = 10.6
38. Which statement is incorrect?
a) pH scale was presented by S.P.L. Sorensen
c) pH scale is applicable to only non aqueous solution
b) pH scale ranges between 0 to 14
d) pH scale is applicable to only aqueous solutions
39. How is the exact pH of an aqueous solution measured ?
a) pH paper
b) Litmus paper
c) pH meter
d) Universal indicator
40. Which of the following substances is an antacid?
a) NaCL
b) Mg(OH)2
c) HCL
d) H2SO4
41. The aqueous solution having pH 11 is how many times less basic than aqueous solution having pH8?
a) 3
b) 30
c) 300
d) 1000
42. pH + pOH = ?
a) 7
b) 0
c) 14
d) 10
43. Which of the following formulae is correct?
a) Mole =
π‘€π‘œπ‘™π‘’π‘π‘’π‘™π‘Žπ‘Ÿ π‘šπ‘Žπ‘ π‘ 
b) Mole =
π‘€π‘œπ‘™π‘’π‘π‘’π‘™π‘Žπ‘Ÿ π‘šπ‘Žπ‘ π‘ 
c) Mole =
d) Mole =
π‘€π‘œπ‘™π‘’π‘π‘’π‘™π‘Žπ‘Ÿ π‘šπ‘Žπ‘ π‘ 
44. If the pH of the aqueous solutions A,B , C and D are 1.9, 2.5, 2.1 and 3.0 respectively, then what will be the
order of
a) A <C < B < D
b) D < C < B < A
c) D <B < C < A
d) D >C >B >A
45. Which solution will be basic?
a) [H3O+] = 10 -5 M
b) [H3O+] = 10 -12 M
c) [H3O+] = 10 -7 M
d) [H3O+] = 10 -4 M
46. If a solution has pH = 7, it will be __________
a) acidic
b) basic
d) neutral
d) none
47. The physiological reactions occurring in human body takes place in the range of _____ pH.
a) 0 to 7
b) 4.4 to 7
c) 7 to 7.8
d) 9.4 to 10.8
48. The pH of HCL secreted in the stomach changes between ________
a) 1 to 3
b) 5 to 7
c) 3 to 5
d) 3.5 to 4.5
48. Which compound neutralizes the effect of ‘acidity’ in stomach?
a) NaHCO3
b) Mg (OH)2
c) CaCO3
d) All the given
49. What range of pH is considered perfect for a fertile land ?
a) 5.3 and 6.5
b) 6.5 to 7.3
d) 8.7 to 9.9
c) 7.3 to 8.7
50. At what pH level does the decay of teeth take place inside mouth?
a) 10.5
b) 5.5
c) 6.5
d) 7.5
51. Which substance is present in poison of honeybee?
a) lime
b) calcium phosphate
c) Melittin
d) pepsin
52. Which of the following is strong acid?
a) Acetic acid
b) citric acid
c) nitric acid
d) oxalic acid
53. When a strong acid combines with a strong base, the nature of aqueous salt solution will be
a) neutral
b) acidic
c) basic
d) slightly basic
54. Na2 SO4 + Ba(OH)2 οƒ  x + 2NaOH , what is x?
a) BaSO2
b) BaSO3
c) BaSO4
d) BaCL2
Standard : 10 : SCIENCE [ lesson – 8 ] Metals
Q.1 Choose the correct. [Marks : 50]
(1) Which process is used to get Alumina from Bauxite ?
(a) Liquefaction
(b) Electrolysis
(c) Hall-Heroult
(d) Bayer's process
(2) From which ore copper is available ?
(a) Bauxite
(b) Haematite
(c) Malachite
(d) Dolomite
(3) On what base reactivity series is made ?
(a) Ionisation process
(b) Decomposition process
(c) Reduction process
(d) Oxidation process
(4) In which state mercury is ?
(a) Gaseous
(b) Solid
(c) None
(d) Liquid
(5) Which gas is responsible for corrosion of iron ?
(a) Nitrogen
(b) Chlorine
(c) Carbon monoxide
(d) Oxygen
(6) What is in musical instrument ?
(a) Magnelium
(b) Stainless steel
(c) Steel
(d) Brass
(7) By which method copper pyrites is concentrated ?
(a) Magnetic separation method (b) Froth floatation process
(c) None
(d) Cnetrifugal process
(8) During the extraction of iron, by whose reduction metallic iron is formed ?
(a) Soil
(b) Sand
(c) Lime stone
(d) Coke
(9) Which caret of gold is not used for preparing Jewellery ?
(a) 18
(b) 24
(c) 20
(d) 22
(10) By which process Lead and Tin metals are purified ?
(a) Magnetic separation
(b) Electrolysis
(c) Centrifugation
(d) Liquefaction method
(11) Which metals are bad conductor of heat ?
(a) Copper and Lead
(b) Lead and Mercury
(c) Sodium and Potassium
(d) Mercury and Aluminium
(12) What happens when Zn powder is added in aqueous solution of copper sulphate ?
(a) There is no change in colour
(c) Blue colour of solution fades
(b) Blue colour of solution becomes dark
(d) There is no chemical reaction
(13) State an alloy, on which there is no effect of air, water and alkali.
(a) Bronze
(b) Brass
(c) Stainless Steel
(d) Magnelium
(14) Which metal does not react with water ?
(a) Aluminium
(b) Gold
(c) Magnesium
(d) Zinc
(15) Which metal is used for coating the surface of iron to prevent rusting ?
(a) Copper
(b) Zinc
(c) Iron
(d) Aluminium
(16) Which is the reaction of corrosion ?
(a) Oxidation
(b) Reduction
(c) Breaking of metal
(d) None
(17) Which metal reacts strongly with cold-drinks from the following ?
(a) Gold
(b) Megnesium
(c) Aluminium
(d) Sodium
(18) Which reaction occurs at cathode during electrolysis ?
(a) Reduction
(b) Oxidation - reduction
(c) Oxidation
(d) None
(19) What is called compounds which are found from the earth ?
(a) Non metal
(b) Pure metal
(c) Minerals
(d) Ores
(20) What is the reactivity of metals at the right side of hydrogen than that of left side ?
(a) less
(b) same
(c) more
(d) None
(21) Which alloys is used in surgical instruments ?
(a) Stainless steel
(b) Magnelium
(c) Steel
(d) Brass
(22) Aluminium reacts with which water to produce hydrogen gas ?
(a) cold water
(b) very cold water
(c) hot water
(d) water vapour
(23) How are melting point of alloys than that of their Constituents ?
(a) Same
(b) High
(c) Low
(d) None
(24) Which metal is added in gold for preparing Jewellery or gold ornaments ?
(a) Zinc
(b) Nickel
(c) Copper and Silver
(d) Platinum
(25) Which is more reactive metal from the following ?
(a) Mg
(b) Zn
(c) Cu
(d) Na
(26) In which process fine powder of ore is rotated on a round table ?
(a) Centrifugation
(b) Froth floatation
(c) Magnetic separation method
(d) None
(27) Which ore is concentrated by magnetic separation method ?
(a) Iron
(b) Copper
(c) Calcium
(d) Aluminium
(28) By which process sulphide ores are concentrated ?
(a) Calcination
(b) Froth floatation method
(c) Centrifugal method
(d) Magnetic separation method
(29) What is the name of an alloy of Al and Mg ?
(a) Steel
(b) Brass
(c) Bronze
(d) Magnelium
(30) How many elements are found till today ?
(a) 63
(b) 114
(c) 92
(d) 105
(31) Which metal is obtained from Bauxite ?
(a) Ca
(b) Fe
(c) Al
(d) Cu
(32) What is called extraction of metal from its ore ?
(a) Physics
(b) Metallurgy
(c) Chemistry
(d) Biology
(33) Which sphere is made-up of send, soil and stone of the earth ?
(a) Weather
(b) Atmosphere
(c) Hydrosphere
(d) Lithosphere
(34) Which type of Silicon, Boron and Germanium metals ?
(a) Semi Conductor
(b) None
(c) Non-Conductor
(d) Good Conductor
(35) Which metal has high conductivity of electricity ?
(a) Mercury
(b) All of these
(c) Lead
(d) Aluminium
(36) What was used to get desired type of iron by heating iron in absence of air ?
(a) Paper
(b) Wood
(c) Leather
(d) Iron
(37) What is called when the cell potential of a cell is measured is comparison to standard hydrogen electrode ?
(a) MFE
(b) pH
(c) Reactivity series
(d) EMF
(38) Which is the correct from the following ?
(a) Zn > Al > Mg > Ca
(b) Mg > AL > Zn > Fe
(c) Na < Ca < Mg < Al
(d) Fe > Zn > Al > Mg
(39) What is the 1% copper in Germanium used as semi-metal ?
(a) 1 : 10 lakh
(b) 1 : 10 thousand
(40) Which property metallic oxide has ?
(c) 2 ppm
(d) 3 ppm
(a) Acidic
(b) Basic
(c) None
(41) By which substance sulphide ore stick in froth floatation process ?
(a) Terpentine Oil
(b) None
(c) Water
(d) Pine oil
(42) What is obtained at anode during electrolysis ?
(a) Reduction
(b) Oxidation - Reduction
(c) None
(d) Oxidation
(43) Which costly method is used to get ultrapure metals uranium and Germanium ?
(d) Neutral
(a) Bayer's process
(b) Electrolysis method
(c) Hall-Heroult method
(d) Van Arkel method
(44) Which is not the ore of calcium ?
(a) Calcium
(b) Silver glance
(c) Gypsum
(d) Silver
(45) What is formed by decmposes of lime stone ?
(a) Snd
(b) Slag
(c) Lime
(d) Carbond dioxide
(46) Magnesium reacts with which water to produce hydrogen gas ?
(a) Very pure water
(b) Hot water
(c) Water vapour
(d) Cold water
(47) What is that process-When metals are exposed to air, they react with air
and moisture present in the environment and result into destruction of metals?
(a) Calcinations
(b) Corrosion
(c) Reduction
(d) Breaking of metal
(48) Which alloy is used in preparation of coins and balances ?
(a) Magnelium
(b) Steel
(c) Stainless steel
(d) Brass
(49) From which part of the earth Aluminium is available in the form of oxide or sulphide ?
(a) Atmosphere
(b) None
(c) Hydrosphere
(d) Lithosphere
(50) Solder is an alloy of which metals ?
(a) Copper and Zinc
(b) Iron and Carbon
(c) Lead and Tin
(d) Aluminium and Magnesium
(51) What % pure Alumina is obtained by Bayer's process ? (a) 100%
(b) 99.5%
(c) 90%
(d) 95%
(52) Which elements from the following are used to make special type of iron ?
(a) Silver and Copper
(b) Carbon and Nitrogen
(c) Copper and Aluminium
(53) Which of the following is more reactive than copper ?
(a) Zinc
(b) Silver
(d) Copper and Carbon
(c) Mercury
(d) Gold
(54) What is called remaining collected at the bottom of anode during electrolysis of copper ?
(a) Mud
(b) Calcination
(c) Anode mud
(d) Froth
(56) Which alloys is used in automobile spare parts ?
(a) Stainless Steel
(b) Steel
(c) Magnelium
(d) Brass
(57) Which method is used to get 100% pure metal ?
(a) Smelting
(b) Calcination
(c) Ultra purification
(58) Which metal is available from Haematite ?
(a) Ca
(d) Centrifugation
(b) Al
(c) Cu
(d) Fe
(59) Electrode of which metal is used in electric cell ?
(a) Copper
(b) Aluminium
(c) Calcium
(d) Platinum
(60) By what name substances are called which are used to prevent corrosion ?
(a) Coating
(b) Galvanized
(c) All three
(d) Enamal
(61) What precautions should be taken to prevent corrosion ?
(a) Coating of less reactive metal should be made
(c) It should be kept open
(b) It should be kept in water
(d) Coating of more reactive metal should be made
(62) Which metal is in liquid form ?
(a) Uranium
(63) What is obtained by Bayer's process ?
(b) Sodium
(a) Alumina
(c) Gallium
(b) Feric acid
(d) Lead
(c) Aluminium
(64) What is used as Anode in Hall-Heroult method ?
(a) Copper rod
(b) Iron rod
(c) Carbon rod
(d) Graphite
(65) Which ally is formed by the mixture of iron and carbon ?
(a) Galvanized
(b) Magnelium
(c) Brass
(d) Steel
(66) What is called homogenous mixture of (molten) metals ?
(a) Alloy
(b) Slag
(c) Homogenous mixture
(d) Pure metal
(67) Which of the following is not used for purification of metal ?
(a) Liquefaction
(b) Froth floatation
(c) Electrolysis
(d) Fractional distillation
(d) None
(68) Which method is used for purification of reactive metals ?
(a) Calcination
(b) Electrolysis
(c) Roasting
(d) Reduction
(69) Which plate is used as cathode when steamer is in contact with water ?
(a) Mg and Zn both
(b) Fe
(c) Zn
(70) From which state silver is found ?
(d) Mg
(a) Rajasthan
(b) Gujarat
(c) Bihar
(d) Tamilnadu
(71) Brass is an alloy of which metals ?
(a) Copper and Zinc
(b) Copper and Tin
(c) Iron and Nickel
(72) Which is semimetal from the following ?
(a) Platinum
(d) Aluminium and Magnesium
(b) Iron
(c) Germanium
(d) Copper
(73) Who gave the process to get pure Aluminium in 1886 ?
(a) Bayer
(b) Hall-Heroult
(c) Krisher and Trops
(d) all of these
(74) Which process is used to remove sulphur of sulphide compounds and to convert into its oxide form ?
(a) Centrifugation
(b) None
(c) Calcination
(d) Roasting
(75) By which metal of 1 ppm in Uranium nuclear fission reaction becomes slow ?
(a) Boron
(b) Germanium
(c) Zinc
(d) Copper
(76) What is meaning of 22 caret gold ?
(a) 20 parts gold and 2 parts copper and 2 parts silver
(c) 22 parts gold and 2 parts silver or copper
(77) Which metal is found from Lime stone ?
(b) 24 parts gold
(d) 24 parts gold and 2 parts copper or silver
(a) Iron
(b) Copper
(c) Calcium
(d) Silver
(78) Why Cryolite is used in Hall-Heroult method ?
(a) To bring melting point high
(b) To bring melting point down
(c) To bring boiling point low
(d) To bring boiling point high
(79) Of what blast furnace is made up ?
(a) Fire proof bricks
(b) Glass
(c) Graphite
(d) Iron
(80) Which method is not included in concentration of ore ?
(a) Smelting
(b) Froth floatation
(c) Centrifugal method
(d) Magnetic separation method
(81) Which metals are more reactive ?
(a) which cannot do chemical reaction
(c) Which gains electrons easily
(b) Which loses electrons easily
(d) None
(82) What is called Polar region of the earth ?
(a) Lithosphere
(b) None
(c) Hydrosphere
(83) Which metal is purified by Hall-Heroult method ?
(84) Which metal can be cut by knife ?
(d) Atmosphere
(a) Al
(a) All three
(b) Cu
(b) Na
(85) Stainless stell is an alloy of which metals ? (a) Fe and C
(c) K
(b) Fe, Ni, Cr
(c) Ca
(d) Fe
(d) Pb
(c) Al and Mg
(d) Zn and Cu
(86) Which method is used for oxidation of Chromium and Iron ?
(a) Copper
(b) Aluminium
(c) Carbon
(87) In how many stages metallurgy is divided ?
(d) Zinc
(a) Five
(b) Two
(c) Three
(d) Four
(88) What is used to reduce oxides of metal ?
(a) Copper
(b) Zinc
(c) Carbon or carbon monoxide
(d) Aluminium
(89) Which principle is used in fractional distillation ?
(a) Fractional distillation
(b) Roasting
(c) Fractional crystallisation
(d) Fractional separation
(90) Which of the following is the part of Atmosphere ?
(a) Calcium
(b) Nitrogen
(c) Sodium
(d) Magnesium
1 _____ metal is used in preparation of pipe for flow of water and to get protection from radiation.
A iron
B aluminium
C lead
D zinc
2 what is the chemical formula of bauxite?
A Al2O3
B Al2O3.2H2O
C Al2O3.H2O
D Fe2O3
3 what is the chemicaI formula of dolomite?
B Cu(OH)2. CuCO3
D CuFeS2
4 by which reaction is metal obtained from metal oxide?
A liquefaction
B reduction
C calcination
D roasting
5 what is the molecular formula of sodium aluminate?
A NaAlO2
B Na3AlF6
C Al2O3
D NaAlO2
6 in hall- heroult method , the melting point can be further lowered by addition of_____?
A NaAlO2
B Al2O3
C CaCl2
D CaF2
7 what is the highest temperature in blast furnace?
A 1973 0C
B 1973 K
8 what type of reaction is C + O2
A exothermic
C 1793 K
D 673K
B endothermic
C neutralization D decomposition
9 which of the following option is correct according to the reactivity of metal?
A Fe> Mg> Al > Zn
B Mg>Al>Zn >Fe
C Al>Mg > Fe> Zn D Zn > Mg > Al> Fe
10 which of the following options for Na , Mg , Al and Ca is correct accoding to the reactivity of
A Na>Mg>Ca>Al
B Mg>Al> Ca>Na
C Na>Ca> Mg> Al
D Mg >Cl >Al >Na
11 which metals are poor conductor of electricity?
A lead and silver
B gold and silver C coppere and aluminium
D lead and mercury
12 which metals are stored in kerosene?
A mercury and silver
B calcium and magnesium C sodium and potassium D silver and gold
13 which of the following metals does not react with water?
A copper
B gold
C silver
D all
14 dihydrogen gas is not produced by reaction of metals with dilute_____?
D All
15 In which of the following , displacement reaction is possible?
A solution of NACl + Coin of copper
B solution of mgcl2 + coin of aluminium
C solution of FeSo4 + coin of silver
D solution of AgNo3 + coin of copper
16 which of the following statements is incorrect?
A corrosion of copper takes place by contact with air and water
B the melting point and boiling point of metals are low
C the method to convert carbonate containing
ore to metal oxide is called calcinations
D the displacement of less active metals from their solution takes place by more active metal.
17 what is the chemical formula of rust?
B F2O3.xH2
C Fe3O4.xH2o
D Fe2O3.H2Os
Standard : 10 : SCIENCE [ lesson – 9] Non metals
Q.1 Choose the correct. [Marks : 50]
(1) Sulphur is ___ in water.
(a) insoluble
(b) none
(c) soluble
(d) solute
(2) Physical properties of allotrops of solphur are different because ___.
(a) physical condition is different
(c) they show two allotropes
(b) shapes of crystals are different
(d) their stability is different
(3) By which process sulphur is obtained directly from the earth ?
(a) Haber process
(b) Frasch process
(c) Contact process
(d) Bayer's process
(4) Why hydrogen does not exists in atomic form ?
(a) As it is lightest element (b) Because of least atomic number (c) All of these
(d) Because its reactivity
(5) Which is solid non-metal ?
(a) Sulphur
(b) Carbon
(c) Phosphorus
(d) All the three
(6) Non-metal are not able to displace hydrogen from acids because ___.
(a) Non-metals can not react with sulphuric acid
(c) Non-metals can react with base only
(b) Non-metals are inactive elements
(d) Non-metals accept elements
(7) Which acid use in the preparation of hydrogen ?
(a) Dilute Hydrochloric acid
(c) A and B both
(b) Dilute Sulphuric acid
(d) Dilute Hydrochloric acid & Dilute Sulphuric acid
(8) Which is the chemical property of Hydrogen ?
(a) In can reacts with chlorine easily
(c) All of these
(b) It forms hydride by reacting with Lithium, sodium
and calcium
(d) It reacts with hydrogen to form water
(9) Which is not the property of ammonia ?
(a) Soluble in water
(b) It is neutral gas
(c) Strong Smell
(d) Colourless gas
(10) How non-metal can make negative iron ?
(a) By exchanging electron
(b) By accepting electron
(c) All the three
(d) By losing electron
(11) Which is not the property of hydrogen ?
(a) Neutral gas
(b) Heavier than air
(c) Colourless, odourless, tasteless gas
(d) In soluble in water
(12) Which gas occurs in free state in the earth ?
(a) Hydrogen
(b) None
(c) Oxygen
(d) Nitrogen
(13) Which is not physical property of non-element ?
(a) Non-metals are light in weight
(b) Non-metals produce ringing sound
(c) Non-metals are not hammered
(d) Non-metals are soft
(14) How non-metal are ?
(a) Heavy
(b) Hard
(c) Soft
(d) Prdouces sonorus sound
(16) How ammonia is decomposed ?
(a) By passing electric sparking
(b) By passing over platinum wire gauss
(c) By adding hydrochloric acid
(d) By electrotysis
(17) In which liquid sulphur is insoluble ?
(a) None
(b) Water
(c) Carbon-di-sulphide
(d) Methyl benzene
(18) Which oxides are formed with oxygen by non-metals ?
(a) Basic or neutral
(b) Acidic or neutral
(19) Which non-metal is in gaseous state ?
(c) Acidic or basic
(d) Acidic, basic or neutral
(a) Hydrogen
(b) Nitrogen
(c) All the three
(d) Oxygen
(20) On which hydrogen can be adsorbed ?
(a) Solid metal
(b) Non metal
(c) Water
(d) Semi metal
(21) Non-metal elements are called ___.
(a) electrically neutral
(b) electric positive elements
(c) Electron acceptor
(d) electric negative elements
(22) Which non-metal is used in the preparation of substance to destroy fungi ?
(a) Phosphorus
(b) Nitrogen
(c) Hydrogen
(d) Sulphur
(23) Which is the highest element ?
(a) Sulphur
(b) Hydrogen
(c) Nitrogen
(d) Chlorine
(24) When hydrogen gas is used from the following ?
(a) In welding of metals & As a fuel in rocket
(c) In welding of metals
(b) As a fuel in rocket
(d) all of these
(25) Which is the property of non-metal from the following ?
(a) Produces sonorus sound
(c) cannot be hammered
(b) Cannot be hammered & Cannot be bent
(d) Cannot be bent
(26) What is the electronic confugaration of sulphur ?
(a) 10,6
(b) 6,2,8
(c) 8,2,6
(d) 2,8,6
(27) From which regions sulpher is obtained ?
(a) Volcanic region
(b) Ocean
(c) Desert
(d) Sandy soil
(28) By which bond non-metals react with chlorine to form chloride compounds ?
(a) Covalent bond
(b) Ionic bond
(c) Hydrogen bond
(29) Which is minimum reactive metal ?
(a) Sodium
(d) None
(b) Calcium
(c) Magnesium
(d) Potassium
(30) Granual Zinc is used in the preparation of hydrogen because ___.
(a) As it is granuals it reacts faster with acid
(b) As particles disperse, reaction becomes faster.
(c) As area decreases reaction becomes faster
(d) Reaction becomes faster with acid as area
(31) Sulphurous acid is ___.
(a) Concentrated acid
(b) Strong acid
(c) Very weak acid
(d) Dilute acid
(32) Aqueous solution of ammonia acts as ___.
(a) neutral
(b) acid
(c) concentrated
(d) base
(34) How many non-metal elements are there ?
(a) 10
(b) 11
(c) 22
(d) 30
(35) Where sulphur dioxide is used ?
(a) As a preservative
(b) Production of sulphuric acid
(c) All of these
(d) Paper industry
(36) On which side non-metals are placed in periodic table ?
(a) Right
(b) Upper side
(c) Left
(d) Downward
(37) In how many ways sulphuric acid used ?
(a) Two
(b) One
(c) Three
(d) Four
(38) Which gas is formed by reaction of hydrogen with nitrogen ?
(a) Methane
(b) Hydrogen chloride
(c) Ammonia
(d) Hydrogen sulphide
(39) Non-metals are called electronegative elements because ___.
(a) it acts as negative electrode in electric conduction
(c) it gains electrons and forms negative ion
(b) it loses electrons and forms negative ion
(d) it attracts towards negative electrode
(40) Which is not the ore of sulphur ?
(a) Copper pyrites
(b) Zinc blend
(c) Iron pyrites
(d) Haematite
(41) Where sulphuric acid is not used from the following ?
(a) As disinfectant
(b) Fertilizer
(c) Stroage battery
(42) What is the colour of sulphur of crystal form ?
(d) Paint
(a) Yellow
(b) White
(c) Black
(d) Red
(43) Which non-metal is good conductor of heat and electricity ?
(a) Graphite
(b) Carbon
(c) Sulphur
(44) How many solid non-metals are there ?
(d) Oxygen
(a) 10
(b) 11
(c) 1
(d) 22
(45) What is formed when sulphur reacts with oxygen ?
(a) Sulphur trioxide
(b) Sulphurus acid
(c) Sulphuric acid
(d) Sulphur dioxide
(46) Where sulphur is not used from the following ?
(a) Sking ointment
(b) Production of paper
(c) Insecticides
(d) Cell
(47) By which reaction non-metals react with hydrogen to form hydride ?
(a) Attraction by one other (b) Geometrical construction
(c) Force of attraction
(d) Sharing of electrons
(48) How hydrogen is industrially produced ?
(a) From methane gas
(b) By electrolysis of pure water
(c) Reaction of metal with water
(d) From zinc and hydrochloric acid
(50) Which non-metal is used in manufacture of disinfactant ?
(a) Nitrogen
(b) Sulphur
(c) Phosphorus
(d) Hydrogen
(51) Sulphuric acid removes water from paper and wood, this process is known as ___.
(a) Absorption of water (Hygroscope)
(c) Attraction of water
(b) Moving water molecules
(d) Repulsing water molecules
(53) What is produced by Haber's process ?
(a) Sulphur
(b) Sulphuric acid
(c) Hydrogen gas
(d) Ammonia gas
(55) What is the shape of rhombic sulphur ?
(a) Cubodial
(b) Needle shape
(56) Which is liquid non-metal ?
(c) Wavy structure
(a) Sulphur
(d) Octahedral
(b) Bromine
(c) Phosphorus
(d) Chlorine
(57) By which sulphuric acid is produced ?
(a) Electrolysis process
(b) Haber process
(c) Frasch process
(d) Contact process
(58) State shape of monodinic sulphur ?
(a) Needle shape
(b) Cuboidal
(c) Octanedral
(d) Wavy structure
(59) Where ammonia is used from the following ?
(a) In explosive
(b) In the production of chemical fertilizer
(60) Where sulphur is not used ?
(a) In skin ointment
(c) In the nylon fibres
(b) In preparation of baking sode
(d) Vulcanisation of rubber
(61) Which is non-metal ?
(a) Carbon
(b) Phosphorus
(c) Sulphur
(d) Magnecium
(62) On which physical property Frasch process works ?
(a) High melting point
(b) Free state
(c) Lower melting point
(d) More quntity
(63) Which gas sulphur is reacted to get hydrogen sulphide ?
(a) Nitrogen
(b) Carbon dioxide
(c) Oxygen
(d) Hydrogen
(64) In which formation phosphorus is used ?
(a) In the preparation of disinfactant
(c) In preparation of Ammonia
(b) In production of explosives
(d) In manufacture of chemical fertilizer
(65) Which is the reactive metal ?
(a) Sodium
(b) All of these
(c) Potassium
(d) Calcium
(66) Where ammonia gas is not used from the following ?
(a) In the production of Nitric acid
(c) In the production of Hydrochloric acid
(b) In the production of washing soda
(d) In the production Ammonium nitrate
(d) All of these
(c) Gun powder
(67) Which is the main non element on the sun ? (a) Oxygen
(b) Hydrogen
(c) Carbon
(d) Nitrogen
(68) Name explosive substance.
(a) Nitric acid
(b) Ammonia
(c) Hydrochloric acid
(69) What is the atomic number of sulphur ?
(70) Where ammonia is not used ?
(d) Nitroglycerine
(a) 15
(b) 16
(a) Nylon fibers
(c) 14
(b) Alotrops
(d) 18
(c) Welding
(d) Fertilizer
(71) In which production of medicine from the following ammonia gas is used ?
(a) Folic acid
(b) Painbam
(c) Aspirin
(d) Paracitamol
(72) Hydrogen does not show any reaction with blue or red litmus paper because ___.
(a) It is neutral gas
(b) In soluble in water
(c) It is colourless gas
(d) Lighter than air
1 how many elements do not act like metals?
A 10
B 11
C 16
D 18
2 how many non metals are found in liquid state?
B 10
C 16
D 18
C wool
D all
C hydrogen
D carbon
3 sulphur is present in _____?
A protein
B hair
4 which of the following oxide is acidic oxide?
A H 2O
5 which is the main non metal present in the sun?
A nitrogen
B oxygen
6 which gas is produced when zinc react with diluted HCL ?
A chlorine
B oxygen
C hydrogen
D ammonia
7 at what temperature and pressure is manufacture of dihydrogen gas carried out industrially?
A 1073 oC and 13 bar
B 1073 k and 30 bar
C 1073k and 13 bar
D 1037 k and 30 bar
C ammeter
D none of these
C both a and b
D none of these
C solvay's process
D frasch's methhod
8 what is used for elecrolysis of pure water?
A voltmeter
B voltameter
9 which medicine is prepared using ammmonia?
A para amino benzoic acid B folic acid
10 by which method is ammonia gas manufactured?
A haber's process
B bayer's process
11which of the following fertrilizer is prepared by using ammonia?
A ammonium nitrate
B ammonium sulphate
C diammonium phosphate D all
12 which of the following is not an ore of sulphur?
A galena
B malachite
C haemetite
D dolomite
13 which gas has a very pungent smell that irritates the eyes and nose?
A co2
B H2
D H2 s
14 in the presence of which catalyst is suphur dioxide heated at high temperature to form sulphur
A platinum
B nickel
15 what is the percentage of H2so4 in con. H2so4 ?
C iron
D vanadium pentoxide
A 85%
B 95%
C 98%
D 100%
16 which acid is prepared by ostwald's process from ammonia gas?
D CH3COOHsssss
Standard : 10 : SCIENCE [ lesson – 10 mineral coal and mineral oil ]
Q.1 Choose the correct. [Marks : 50]
(1) Which gas is present in liquid form in LPG cylinder ?
(a) Butane
(b) Methane
(c) Oxygen
(d) Ethane
(2) Combustion of which fuel produces only carbon dioxide and water?
(a) Natural gas
(b) Diesel
(c) Coal
(d) Lubricanting oil
(3) Which fuel is used as an eco friendly fuel in vehicles?
(a) Diesel
(b) CNG
(c) Petrol
(d) Kerosene
(4) Which statement is not true for renewable source of energy?
(a) They are unlimited
(b) It does not causes pollution
(c) It should be used wisely
(d) They are cheap in cost
(5) Which are main constituents of coal ?
(a) Hydrogen
(b) Oxygen
(c) All of these
(d) Carbon
(6) In destructive distillation of wood, which product is obtained as residue in the hard glass test tube ?
(a) Coal gas
(b) Charcoal
(c) Coaltar
(d) None of these
(7) How much percent of petroleum is present in gasoline ?
(a) 40%
(b) 35%
(c) 45%
(d) 50%
(8) How much percentage of carbon is present in Lignite ?
(a) 94 to 98%
(b) 78 to 87%
(c) 27%
(d) 28 to 30%
(9) Which of the follwoing fuel is a fossil fuel?
(a) Ethanol
(b) Wood
(c) NAtural gas
(d) Biogas
(10) How much percentage of carbon is present in Anthracite ?
(a) 25 to 40%
(b) 4 to 60%
(c) 94 to 98%
(d) 78 to 87%
(11) How many carbon atoms are present in hydrocarbon of petrol ?
(a) 10 to 14
(b) 14 o 20
(c) 6 to 12
(12) Which coal is of the best quality ?
(d) 5 to 10
(a) Lignite
(b) Peat
(c) Anthracite
(d) Bituminous
1 which is primary state in transformation of coal?
A lignite
B bituminous
C anthracite
D peat
2 which is matured form of coal?
A lignite
B bituminous
C anthracite
D peat
3 what is the percentage proportion of carbon in peat?
A 28-30%
B 78-86%
C 28%
D 94- 98%
4 which type of coal does not produce smoke when burn?
A lignite
B bituminous
C anthracite
D peat
C 27kj/g
D none
C 28%
D 94- 98%
5the heat energy of lignite is about____?
A 33kJ/g
B 30kj/g
6 the proportion of carbon in anthrasite is ____?
A 28-30%
B 78-86%
7which of the following components is not obtained when destructive distillation of mineral coal in
carried out?
A coal gas
B methane
C coaltar
D coke
8 what is the proportion of carbon in coal?
A 3330%
B 33%
C 78% D 80%
9 water gas is a mixture of which gases?
A carbondioxide and hydrogen
B ammonia and hydrogen
c carbonmonoxide and hydrogen
D ammonia and carbon monoxide
10 at what depth did advered drac get oil from oil well?
A 21 meter
B 31meter
C 41meter
D 100meter
11 which scientist suggested carbides of metals on reaction with acidic water forms petroleum?
A berthelot
B mendeleev
C avvered drac
D samuel killer
12 the full form of ONGC is?
A orientation of nobel gas company ltd.
B oil and naturel gas commision Ltd.
C oil and naturel gas corporation Ltd.
D oil of natiuonal gas comp[any Ltd.
13 what type of compounds are paraffins?
A aromatic compounds B aliphatic compounds C cyclic compounds D saturated compounds
14 in which rocky region is petroleum found?
A igneous
B serdimentory
C metamorphic
D none
15 the temperature rang of kerosene obtained by fractional distillation of petroleum is____?
A 303 to 393K
B 393 to 453K
C 473 to 548K
D 533 to 6134K
16 which component obtained from refining of petroleum is used as ba solvent in petrochemicals?
A naphtha
B kerosene
C tar
D petroeum coke
17 which gas is filled at high temperature in cylinders of household cooking gas?
A methane
B ethane
C propane
D butane
18 what is the angle between any two bonds in methane molecule?
A 1050 54'
B 1090 28'
19 what is used in jet planes?
A gasoline
C 119o 28'
D 1900 28'
B diesel oil
C kerosene D all
C n- heptane
D isoheptane
C Pb4(C2H5)
D (C2H5)4 Pb
20 which hydrocarbon shows neglible knocking?
A n- octane
B isooctane
21 the molecular formula of TEL is____?
A (C2H5)2 Pb
B (CH3)4 Pb
22 in which reaction during catalytic cracking are the saturated substances coverted in to
unsaturated ?
A isomerization
B dehyrogenation
C aromatization
D alkylation
23 LPG contains mainly _______ along with smaller proportion of propane and butane gas?
A ethane
B methane
C propane
D butane
24 what is the geometrical shape of methane molecule?
A linear
B tetrahedral
C cyclic
D undefined shape
25 the number of isomers for the molecular formula C4H10 are ____?
B 3
C 4
D 5
C CnH2n-2
D CnH2n-6
26 the general formula of alkene series is____?
A CnH2n+2
B CnH2n
27 the general formula of alkane series is____?
A CnH2n+2
B CnH2n
C CnH2n-2
D CnH2n-6
28 what type of hybridization is observed in methane molecule?
A sp
B sp2
C sp3
D dsp2
29 _____ gas is obtained by heating sodium gas and soda lime?
A butane
B propane
C ethane
D methane
30 what is the proportion of CO2 and H2O when methane is burnt in air?
A 1:2
B 2:1
C 1:1
D uncertain
31 what is the proportion of mixture of sodium hydroxide and calcium oxide in soda lime?
A 1:3
B 3:1
C 2:3
D 3:2
32 which gas is filled in the rubber balloons used to enjoy during kite fluting day?
A acetylene gas
B methane gas
C helium gas
D ethane gas
33 vinyl chloride and vinyl cyanide can be formed in reaction of ethane with and ____ respectively