Practice MCQs For Thermal Physics

This quiz contains practice questions for GCE ‘O’ level topic: Thermal Physics. There are explanations for some of the questions after you submit the quiz. If you could not figure out why a particular option is the answer, feel free to drop a comment below or ask a question in ‘O’ & ‘A’ Level Discussion section of the forum. If you wish to contribute questions to this quiz, please contact us.

The quiz comprises of 10 questions, which are randomly selected from a large pool of questions. After completion, you can refresh the page and try the quiz again for a new set of 10 questions.

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1. A substance consists of particles that are close together and moving past each other at random. The average speed of the particles is gradually increasing.

What best describes the substance?

a solid being heated

a solid being melted to form a liquid

a liquid being heated

a liquid being boiled to form a gas

2. The rate of evaporation of a liquid is increased by:

1. increasing its temperature.
2. increasing the pressure over the liquid.
3. blowing a current of air over its surface.
4. decreasing the surface area.

1 and 3 only

1 and 2 only

3 and 4 only

1, 2 and 3

3. A glass jug is designed so that it does not break when boiling water is poured into it.

What sort of glass should be used?

B

C

A

D

4. What is the definition of heat capacity?

the quantity of heat required to change 1 kg of a substance from solid to liquid without a change in temperature

the quantity of heat required to convert an object from solid to liquid without a change in temperature

the quantity of heat required to raise the temperature of 1 kg of a substance through $1^{\circ} \text{C}$

the quantity of heat required to raise the temperature of an object through $1^{\circ} \text{C}$

5. A liquid-in-glass thermometer consists of a bulb containing a liquid. The liquid can expand into a very thin capillary tube.

The liquid in the thermometer is replaced by another liquid that expands more for the same temperature rise.

The new thermometer will have

the same sensitivity but greater range.

the same sensitivity and the same range.

greater sensitivity but less range.

greater sensitivity and greater range.

6. Heat energy is supplied at the same rate to 100 g of paraffin and to 100 g of water in similar containers.

Why does the temperature of the paraffin rise more quickly?

The paraffin is more dense than water.

The paraffin has a larger specific heat capacity than water.

The paraffin has a smaller specific heat capacity than water.

The paraffin is less dense than water.

7. A student investigates changes that may take place as sulphur solidifies. Which of the following correctly describes these changes?

a transfer of energy, but no change in temperature

a transfer of energy and a change in temperature

no transfer of energy, but a change in temperature

no transfer of energy and no change in temperature

8. Fibre is used for home insulation in a cold country, as shown in the diagram.

Heat cannot easily escape through the ceiling because the fibre

heats the roof space.

is warm.

traps air.

is tightly packed.

9. The diagram shows four similar cans. Each can contains the same volume of water initially at $80^{\circ}C$. After five minutes, which can will contain the coolest water?

C

D

A

B

10. In very cold weather, ice can form on the surface of puddles of water because the air temperature is below that of the water. If the ice layer is found to be thickening at its lower surface, then most of the transfer of energy must be by:

conduction away from the ice through the air.

conduction from the upper to the lower surface of the ice.

conduction from the lower to the upper surface of the ice.

convection away from the ice through the water.

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