# Thermodynamics-Concept of Temperature (NEET Physics): Questions 20 - 25 of 36

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## Question number: 20

» Thermodynamics » Concept of Temperature

MCQ▾

### Question

Efficiency of a Carnot engine is 50 % when temperature of outlet is 400 K. In order to increase efficiency up to 70 % keeping temperature of intake the same what will be temperature of outlet

### Choices

Choice (4) Response

a.

690 K

b.

240 K

c.

460 K

d.

870 K

## Question number: 21

» Thermodynamics » Concept of Temperature

MCQ▾

### Question

The temperature of sink of Carnot engine is 27°C and Efficiency of engine is 40%. Then temperature of source

### Choices

Choice (4) Response

a.

127°C

b.

227ºC

c.

27ºC

d.

327°C

## Question number: 22

» Thermodynamics » Concept of Temperature

MCQ▾

### Question

One mole of an ideal gas at an initial temperature of TK does 8 R joules of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is , the final temperature of gas will be

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 23

» Thermodynamics » Concept of Temperature

MCQ▾

### Question

The efficiency of Carnot’s engine operating between reservoirs, maintained at temperatures 27 degree Celsius and -113 degree Celsius

### Choices

Choice (4) Response

a.

0.4%

b.

50%

c.

0.75%

d.

46%

## Question number: 24

» Thermodynamics » Concept of Temperature

MCQ▾

### Question

An ideal gas at 25°C is compressed adiabatically to of its original volume. If , then the rise in temperature,

### Choices

Choice (4) Response

a.

530 K

b.

225 K

c.

405 K

d.

375 K

## Question number: 25

» Thermodynamics » Concept of Temperature

MCQ▾

### Question

One mole of a perfect gas in a cylinder fitted with a piston has a pressure P . volume V and temperature T. If the temperature is increased by 2 K keeping pressure constant, the increase in volume is

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page