# Thermodynamics (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 62 - 67 of 86

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## Question number: 62

» 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.

## Question number: 63

» Thermodynamics » Concept of Temperature

MCQ▾

### Question

If 300 ml of gas at 17°C is cooled to 7°C at constant pressure, then its final volume will be,

### Choices

Choice (4) Response

a.

540.23 ml

b.

289.65 ml

c.

135.35 ml

d.

280.45 ml

## Question number: 64

» Thermodynamics » Concept of Temperature

MCQ▾

### Question

Efficiency of a Carnot engine is 50 % when temperature of outlet is 500 K. In order to increase efficiency up to 60 % keeping temperature of intake the same what will be temperature of outlet

### Choices

Choice (4) Response

a.

200 K

b.

600 K

c.

800 K

d.

400 K

## Question number: 65

» Thermodynamics » Concept of Temperature

MCQ▾

### Question

The temperature of sink of Carnot engine is 27°C and Efficiency of engine is 25%. Then temperature of source

### Choices

Choice (4) Response

a.

127°C

b.

327°C

c.

27ºC

d.

227ºC

## Question number: 66

» 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: 67

» Thermodynamics » Thermal Equilibrium

MCQ▾

### Question

A monoatomic ideal gas, initially at temperature T 1 is enclosed in a cylinder fitted with a frictionless piston. The gas is allowed to expand adiabatically to a temperature T 2 by releasing the piston suddenly. If I 1 and I 2 are the lengths of the gas column before and after expansion respectively, then is given by

### Choices

Choice (4) Response

a.

b.

c.

d.