# Thermodynamics (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 60 - 65 of 86

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## Question number: 60

» Thermodynamics » Thermal Equilibrium

MCQ▾

### Question

A gas mixture consists of 4 moles of oxygen and 10 moles argon at temperature T neglecting all vibrational modes, the total internal energy of the system is

### Choices

Choice (4) Response

a.

29 RT

b.

25 RT

c.

15 RT

d.

11 RT

## Question number: 61

» Thermodynamics » Laws of Thermodynamics » First Law of Thermodynamics

MCQ▾

### Question

In changing the state of thermodynamics from A to B state, dg heat required is Q and the work done by the system is W. Tae change in its internal energy is

### Choices

Choice (4) Response

a.

b.

c.

d.

## 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

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