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Physics 9 Chapter 8 - Thermal Properties of Matter -25
1.
Upon which of the following, the temperature of a substance depends?
a) Heat energy of molecules
b) Potential energy of molecules
c) Light energy of molecules
d) Kinetic energy of molecules
2.
At which temperature, evaporation takes place?
a) 25
o
C
b) 5
o
C
c) All temperatures
d) 10
o
C
3.
With which of the following factors, rate of evaporation is affected?
a) All of these
b) Surface area
c) Temperature
d) Wind
4.
With which of the following factors, rate of evaporation is affected?
a) All of these
b) Wind
c) Nature of the liquid
d) Temperature
5.
At which of the following temperature, evaporation is faster?
a) None of these
b) Low temperature
c) Mid temperature
d) High temperature
6.
In which of the following seasons, evaporation takes place faster?
a) Summer
b) Spring
c) Autumn
d) Winter
7.
At which of the following, evaporation is faster?
a) High temperature
b) Low temperature
c) None of these
d) Small surface
8.
Which of the following gas was used as refrigerant gas?
a) Tungsten
b) Polythene
c) Freon
d) Neon
9.
By which of the following gases, Freon gas is replaced nowadays?
a) Ammonia
b) Tungsten
c) Neon
d) CFCs
10.
What is Freon?
a) IR
b) UV
c) CFCs
d) UR
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