G.H.S
CHEMISTRY HOLIDAY WORK
SEPT, 2012
S.1
1. Which one of the following is false about a luminous flame?
A. it consists of 4 zones
C. it is sooty
B. it is very hot
D. it is yellow in colour
2. A non-luminous flame is suitable for heating in the laboratory because
A.
B.
C.
D.
it is very hot and non-sooty
it is very bright and hot
it contains a lot of carbon particles
it has 3 zones
3. The substance that is responsible for blackening glass in a luminous flame is
A.
B.
C.
D.
methane gas
carbon particles
dust particles
gas particles
4. When the air hole of a Bunsen burner is closed the flame produced is
A.
B.
C.
D.
steady
blue in colour
yellow in colour
very hot
5. The apparatus used for strong heating of small volumes of solids is called
A.
B.
C.
D.
a test tube
a beaker
ignition tube
a boiling tube
6. Which of the following results into a physical change?
A.
B.
C.
D.
heating of ammonium chloride
burning of a candle
rusting of iron
heating of copper
7.
A.
B.
C.
D.
Particles of matter possess the greatest kinetic energy when in:
gaseous state
liquid state
solid state
molten state
8. The following gases exist as diatomic molecules except:
A.
B.
C.
D.
nitrogen
oxygen
hydrogen
helium
9. The force of attraction between particles of different kind is called:
A.
B.
C.
D.
Adhesion force
Repulsion force
Cohesion force
Gravitation force
10. According to Dalton’s atomic theory, matter is made up of countless small particles called:
A.
B.
C.
D.
molecules
atoms
elements
ions
11. Which one of the following statements is not correct?
A. All atoms are electrically neutral
B. Heating of a liquid increases the kinetic energy of its particles
C. The force of attraction in solids is uniform for all particles
D. None of the above
12. A volatile liquid is one which
A.
B.
C.
D.
evaporates easily
less dense than water
has a high boiling point
is denser than water
13. The apparatus used to scoop small volumes of solids from bottles in the laboratory is called a:
A.
B.
C.
D.
glass rod
stirring rod
spatula
watch glass
14. Which one of the following is a mixture?
A.
B.
C.
D.
copper
sodium
bronze
iron
15. The three fundamental particles of an atom are:
A.
B.
C.
D.
electrons, neutrons and protons
electrons, neutrons and deuterium
protonium, deuterium and electrons
proton, protonium and neutron
16. The chemical symbol of copper is:
A.
B.
C.
D.
Co
Cp
Cu
Cr
17. When small particles are strongly illuminated and viewed through a microscope, they appear to
be moving in a random zigzag motion. This is because
A.
B.
C.
D.
of the effect of bright light
the particles are warm
the particles are bombarded by air particles
the air particles are knocked around by the smoke particles
18. The region of a non-luminous gas that contains a lot of un burnt gas is:
A.
B.
C.
D.
The pale blue or purple zone
The cool inner zone
The blue zone
The green or blue zone
19. A gas X has molecular formula X3. X can be described as
A.
B.
C.
D.
polyatomic
diatomic
tri-atomic
monatomic
20. This element is a non-metal but conducts electricity like metals:
A.
B.
C.
D.
Plastic
Graphite
Sulphur
Phosphorous
21. (a) Define the following terms:
(i)
Physical change
(ii)
Chemical change
(b) Give four differences between a physical and a chemical change:
Physical change
Chemical change
1.
1.
2.
2.
3.
3.
4.
4.
( c ) State whether the following are physical or chemical changes:
(i)
Rusting of iron……………………………………………………
(ii)
Combustion of petrol…………………………………………….
(iii)
Burning of a candle………………………………………………
(iv)
Photosynthesis………………………………………………….
(v)
Magnetization of iron………………………………………….
(vi)
Melting of candle wax…………………………………………
22 (a) Draw a well labeled diagram of:
(i) Luminous flame
(ii) Non-luminous flame
(b) Give four ways in which a luminous flame differs from a non-luminous flame
1.
2.
3.
4.
23. (a) Define the following terms:
(i) Matter
(ii) Cohesion
(b) What are the three states of matter?
(i)………………………………………………..
(ii)………………………………………………
(iii)………………………………………………
( c ) Give three ways in which the particles of solids differ from those of gases
1.
2.
3.