# Thermodynamics (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 22 - 25 of 86

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## Question number: 22

» Thermodynamics » Concept of Temperature

MCQ▾

### Question

An ideal gas expands isothermally from a volume V 1 to V 2 and then compressed to original volume V 1 adiabatically. Initial pressure is P 1 and final pressure is P 3. The total work done is W. Then

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 23

» Thermodynamics » Laws of Thermodynamics » Second Law of Thermodynamics

MCQ▾

### Question

One mole of an ideal gas expands at a constant temperature of 300 K from an initial volume of 10 litres to a final volume of 20 litres. The work done in expanding the gas is

(R = 8.31J/mole-K)

### Choices

Choice (4) Response

a.

3456 Joules

b.

1500 Joules

c.

1728 Joules

d.

750 Joules

## Question number: 24

» Thermodynamics » Concept of Temperature

Assertion-Reason▾

### Assertion (Ꭺ)

The specific heat of a gas in an adiabatic process is zero and in an isothermal process is infinite.

### Reason (Ꭱ)

Specific heat of a gas is directly proportional to change of heat in system and inversely proportional change in temperature.

### Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

## Question number: 25

» Thermodynamics » Thermal Equilibrium

MCQ▾

### Question

When heat is given to a gas in an isothermal change, the result will be

### Choices

Choice (4) Response

a.

External work done

b.

Increase in internal energy

c.

External work done and aso rise in temp.

d.

Rise in temperature