Thermal Properties of Matter Test

Result

Thermal Properties of Matter Test - 34

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Question 1
4 / -1

If a cylinder of diameter 1.0 cm at 30°C is to be fitted into a hole of diameter 0.9997 cm in a steel plate at the same temperature, then minimum required rise in the temperature of the plate is (Coefficient of linear expansion of steel = 12 × 10^–6/° C)

A
25°C

B
35°C

C
45°C

D
55°C

Solution
Question 2
4 / -1

An iron bar of length 1 and having a cross-section A is heated from 0 to 100°C . If this bar is so held that it is not permitted to expand or bend, the force that is developed, is

A
Inversely proportional to the cross-sectional area of the bar

B
Independent of the length of the bar

C
Inversely proportional to the length of the bar

D
Directly proportional to the length of the bar

Solution
Question 3
4 / -1

If specific heat of a substance is infinite, it means

A
Heat is given out

B
Heat is taken in

C
No change in temperature takes place whether heat is taken in or given out

D
All of the above

Solution
Question 4
4 / -1

A gas in an airtight container is heated from 25°C to 90°C. The density of the gas will

A
Increase slightly

B
Increase considerably

C
Remain the same

D
Decrease slightly
Question 5
4 / -1

A quantity of heat required to change the unit mass of a solid substance, from solid state to liquid state, while the temperature remains constant, is known as

A
Latent heat

B
Sublimation

C
Hoar frost

D
Latent heat of fusion
Question 6
4 / -1

The latent heat of vaporization of a substance is always

A
Greater than its latent heat of fusion

B
Greater than its latent heat of sublimation

C
Equal to its latent heat of sublimation

D
Less than its latent heat of fusion
Question 7
4 / -1

The factor not needed to calculate heat lost or gained when there is no change of state is

A
Weight

B
Specific heat

C
Relative density

D
Temperature change
Question 8
4 / -1

The saturation vapour pressure of water at 100°C is

A
739 mm of mercury

B
750 mm of mercury

C
760 mm of mercury

D
712 mm of mercury
Question 9
4 / -1

50 gm of copper is heated to increase its temperature by 10°C. If the same quantity of heat is given to 10 gm of water, the rise in its temperature is (Specific heat of copper = 420 Joule-kg^–1° C^–1)

A
5°C

B
6°C

C
7°C

D
8°C

Solution
Question 10
4 / -1

Two liquids A and B are at 32°C and 24°C. When mixed in equal masses the temperature of the mixture is found to be 28°C. Their specific heats are in the ratio of

A
3 : 2

B
2 : 3

C
1 : 1

D
4 : 3

Solution