# Thermodynamics-Concept of Temperature (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 29 - 33 of 36

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## Question number: 29

» Thermodynamics » Concept of Temperature

MCQ▾

### Question

How much work to be done in decreasing the volume of and ideal gas by an amount of 1.4 × 10 -4 m 3 at normal temperature and constant normal pressure of 1 × 10 -5N/ m 2

### Choices

Choice (4) Response

a.

14 Joule

b.

28 Joule

c.

25 Joule

d.

27 Joule

## Question number: 30

» Thermodynamics » Concept of Temperature

MCQ▾

### Question

Work done by 0.2 mole of a gas at 30°C to double its volume at constant pressure is,

(R = 2 cal mol °K)

### Choices

Choice (4) Response

a.

600 cal

b.

154 cal

c.

121.2 cal

d.

160 cal

## Question number: 31

» Thermodynamics » Concept of Temperature

MCQ▾

### Question

An ideal heat engine working between temperature T and r, has an efficiency η, the new efficiency of engine if both the source and sink temperature are doubled, will be

### Choices

Choice (4) Response

a.

b.

η

c.

d.

## Question number: 32

» Thermodynamics » Concept of Temperature

MCQ▾

### Question

A scientist says that the efficiency of his heat engine which operates at source temperature 107°C and sink temperature 27°C is 26%, then

### Choices

Choice (4) Response

a.

Data are incomplete

b.

It is impossible

c.

It is possible but less probable

d.

It is quite probable

## Question number: 33

» Thermodynamics » Concept of Temperature

MCQ▾

### Question

An ideal gas is taken from point A to the point B, as shown in the P-V diagram, keeping the temperature constant. The work done in the process is

### Choices

Choice (4) Response

a.

b.

c.

d.

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