1.
The type of glass
used in making lenses and prisms is?
a. soft glass
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b. pyrex glass
c. jena glass
d.
flint glass
2.
Wood is the
main raw material for the manufacture of?
a. Paint
b.
Paper
c.
Ink
d. Gun powder
3.
How does common salt
help in separating soap from the solution after saponification?
a.
By decreasing solubility of soap
b. By increasing solubility of soap
c.
By decreasing density
of soap
d. By increasing density of soap
4.
Which of the following
is commonly called a ‘polyamide’?
a.
Rayon
b.
Orlon
c.
Terylene
d.
Nylon
5.
The major ingredient
of leather is?
a.
Carbohydrate
b.
Collagen
c.
Polymer
d.
Nucleic acid
6.
In the manufacture of
safety matches, which of the following materials are used to coat the two sides
of match boxes?
1.
Yellow phosphorus
2.
Glue
3.
Glass powder
4.
Red phosphorus
a.
l, 2 and 3
b.
l,3 and 4
c.
l,2 and 4
d.
2,3 and 4
7.
Glass is made of the
mixture of?
a. quartz and mica
b. sand and salt
c.
sand and silicates
d. None of these
8.
Epoxy resins are used
as
a.
moth repellants
b.
insecticides
c.
detergents
d.
adhesives
9.
What is condensation?
a. Change of gas into solid
b. Change of solid into liquid
c.
Change of vapour into liquid
d. Change of heat energy into cooling energy
10.
Which of the following
are true regarding a catalyst?
1. It is a substance which increases the rate of reaction.
2. It is a substance which reduces the activation energy.
3. It is a substance which increases the activation energy.
4. It is a substance which is consumed in the reaction.
1. It is a substance which increases the rate of reaction.
2. It is a substance which reduces the activation energy.
3. It is a substance which increases the activation energy.
4. It is a substance which is consumed in the reaction.
a.
l and 2
b. 2 and 3
c.
3 and 4
d. l and 4
11.
Which of the following
is a physical change?
a. Oxidation
b. Reduction
c.
Sublimation
d. Decomposition
12.
A substance which
changes readily into vapour without heating is called?
a. Efflorescent
b. Synthetic
c.
Volatile
d. Effervescent
13.
Catalytic properties
of a substance may be best defined as a phenomenon of?
a. Absorption
b. Chemisorptions
c.
Adsorption
d. None of these
14.
In which of the
following processes light energy is converted into chemical energy?
a. Respiration
b. Fermentation
c.
Photosynthesis
d. Photorespiration
15.
Photosynthesis is?
a. an exothermic process
b.
an endothermic process
c.
a neutral process
d. a thermostatic process
16.
Combustion is the
process in which?
a. heat is produced.
b. light is produced.
c.
heat and light are produced.
d. None of these
17.
The chemical used as a
‘fixer’ in photography is
a. Borax
b.
sodium thiosulphate
c.
sodium sulphate
d. ammonium persulphate
18.
The rate of
chemical reaction does not depend upon?
a. Concentration
b. Catalyst
c.
Temperature
d.
Pressure
19.
Which of the following
is a chemical change?
a. Magnetization of iron
b. Melting of ice
c.
Burning of sulphur
d. Melting of wax
20.
Which of the following
substances undergoes chemical change on heating?
a. Sodium chloride
b. Silica
c.
Lead nitrate
d.
Platinum wire
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