Let Q and W denote the amount of heat given to an ideal gas and the work done by it in an adiabatic process,

(a) Q = 0

(b) W = 0

(c) Q = W

(d) Q ≠ W

Choose the correct option 

1. (a) , (b) 

2. (b) , (c) 

3. (c) , (d) 

4. (a) , (d) 

Subtopic:  First Law of Thermodynamics |
 85%
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Consider the processes A and B shown in following figure. It is possible that

    

(a) both the processes are isothermal

(b) both the processes are adiabatic

(c) A is isothermal and B is adiabatic

(d) A is adiabatic and B is isothermal

Choose the correct option 

1. (a) , (b) 

2.  (c) only

3. (c) , (d) 

4. (a) , (d) 

Subtopic:  Types of Processes |
 85%
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Three identical adiabatic containers A, B and C contain helium, neon and oxygen respectively at equal pressure. The gases are pushed to half their original volumes.

(a) The final temperatures in the three containers will be the same.

(b) The final pressures in the three containers will be the same.

(c) The pressures of helium and neon will be the same but that of oxygen will be different.

(d) The temperatures of helium and neon will be the same but that of oxygen will be different

Choose the correct option 

1. (a) , (b) 

2. (b) , (c) 

3. (c) , (d) 

4. (a) , (d) 

Subtopic:  Molar Specific Heat |
 69%
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A rigid container of negligible heat capacity contains one mole of an ideal gas. The temperature of the gas increases by 1°C if 3.0 cal of heat is added to it. The gas may be

(a) helium

(b) argon

(c) oxygen

(d) carbon dioxide

Choose the correct option 

1. (a) , (b) 

2. (b) , (c) 

3. (c) , (d) 

4. (a) , (d) 

Subtopic:  Molar Specific Heat |
 76%
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Four cylinders contain equal number of moles of argon, hydrogen, nitrogen and carbon dioxide at the same temperature. The energy is minimum in

(a) argon

(b) hydrogen

(c) nitrogen

(d) carbon dioxide

Choose the correct option 

1. (a) only

2. (b) , (c) 

3. (c) , (d) 

4. (a) , (d) 

Subtopic:  Molar Specific Heat |
 76%
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Let Q and W denote the amount of heat given to an ideal gas and the work done by it in an isothermal process.

(a) Q = 0

(b) W = 0

(o) Q  ≠ W

(d) Q = W

Choose the correct option 

1. (a) , (b) 

2. (b) , (c) 

3.  (d) only

4. (a) , (d) 

Subtopic:  Types of Processes |
 85%
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A gas kept in a container of finite conductivity is suddenly compressed. The process

a.  must be very nearly adiabatic

b.  must be very nearly isothermal

c.  may be very nearly adiabatic

d.  may be very nearly isothermal

Choose the correct option 

1. (a) , (b) 

2. (b) , (c) 

3. (c) , (d) 

4. (a) , (d) 

Subtopic:  Types of Processes |
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The molar heat capacity of oxygen gas at STP is nearly 2.5 R. As the temperature is increased, it gradually increases and approaches 3.5 R. The most appropriate reason for this behaviour is that at high temperatures

1.  oxygen does not behave as an ideal gas

2.  oxygen molecules dissociate in atoms

3.  the molecules collide more frequently

4.  molecular vibrations gradually become effective

Subtopic:  Molar Specific Heat |
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Let ΔWa and ΔWb be the work done by the systems A and B respectively in the previous question.

1.  ΔWa > ΔWb

2.  ΔWa = ΔWb 

3.  ΔWa < ΔWb 

4.  The relation between ΔWa and ΔWb cannot be deduced

Previous Question: Two samples A and B are initially kept in the same state. The sample A is expanded through an adiabatic process and the sample B through an isothermal process. The final volumes of the samples are the same.

Subtopic:  Work Done by a Gas |
 71%
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Let Ta and Tb be the final temperatures of the samples A and B respectively in the previous question.

1.  Ta < Tb

2.  Ta = Tb

3.  Ta > Tb

4.  The relation between Ta and Tb cannot be deduced.
Previous Question: Two samples A and B are initially kept in the same state. The sample A is expanded through an adiabatic process and the sample B through an isothermal process. The final volumes of the samples are the same.

Subtopic:  Types of Processes |
 62%
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