In which of the following pairs of temperature scales, the size of a degree is identical ?

(a) mercury scale and ideal gas scale

(b) Celsius scale and mercury scale

(c) Celsius scale and ideal gas scale

(d) ideal gas scale and absolute scale.

Choose the correct option 

1.  (a) , (b) 

2. (a) , (c)

3. (c) , (d) 

4. (a) , (d)

A solid object is placed in water contained in an adiabatic container for some time. The temperature of water falls during the period and there is no appreciable change in the shape of the object. The temperature of the solid object.

As the temperature is increased, the time period of a pendulum

Choose the correct option 

There is some liquid in a closed bottle. The amount of liquid is continuously decreasing. The vapour in the remaining part

1.  must be saturated

2.  must be unsaturated

3.  may be saturated

4.  there will be no vapour. 

There is some liquid in a closed bottle. The amount of liquid remains constant as time passes. The vapour in the remaining part:
1. must be saturated.
2. must be unsaturated.
3. maybe unsaturated.
4. there will be no vapour.

Vapour is injected at a uniform rate in a closed vessel which was initially evacuated. The pressure in the vessel

1.  increases continuously

2.  decreases continuously

3.  first increases and then decreases

4.  first increases and then becomes constant.

A vessel A has volume V and a vessel B has volume 2V. Both contain some water which has a constant volume. The pressure in the space above water is p_a for vessel A and p_b for vessel B.

1.  p_a = p_b

2.  p_a = 2p_b

3.  p_b = 2p_a

4.  p_b = 4p_a

Water equivalent of a body is measured in

1.  kg

2.  calorie

3.  kelvin

4.  m³

When a hot liquid is mixed with a cold liquid, the temperature of the mixture

1.  first decreases then becomes constant

2.  first increases then becomes constant

3.  continuously increases

4.  is undefined for some time and then becomes nearly constant.