Zeroth Law of Thermodynamics

Q.

Which of the following statement is correct?

1. All substances contract on cooling

2. All the above

3. All substances expand on heating

4. Heat energy flows from hot body to the cold body

Q.

In summer, if a wooden chair and an iron chair kept outside for a long time, then which one will be at a higher temperature?

1. Both will be at the same temperature

2. Iron chair

3. Wooden chair

4. Cannot be determined

Q. What is kinetic theory

Q. What happens in expansion of heat?

Q.

When two bodies A and B are brought in contact with each other, heat does not flow between them. When another body C is brought in contact with B, the heat starts flowing from C to B. After the heat flow stops, C is now brought into contact with A, then which of the following is correct?

1. No heat flows between A and C.

2. Heat flows from A to C.

3. Heat flows from C to A.

4. Heat first flows from A to C and then from C to A.

Q. Suppose a body A at a higher temperature is brought into contact with another body B at a lower temperature, then which among the following are true?

1. Molecules of body A becomes less active.
2. The heat flow is from body A to body B.
3. Molecules of body A becomes more active.
4. The heat flow is from body B to body A.

Q. What happens in expansion of heat?

Q.

What do you understand by thermal equilibrium?