Thermodynamics-Concept of Temperature (NEET Physics): Questions 26 - 31 of 36

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Question number: 26

» 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: 27

» 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: 28

» 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: 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.

η2

d.

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