Thermodynamics (NEET Physics): Questions 17 - 21 of 84

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Question number: 17

» Thermodynamics » Concept of Temperature

MCQ▾

Question

For an adiabatic expansion of a perfect gas, the value of PP is equal to

Choices

Choice (4) Response

a.

γ2VV

b.

γVV

c.

γVV

d.

VV

Question number: 18

» 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 1 K keeping pressure constant, the increase in volume is

Choices

Choice (4) Response

a.

V91

b.

2V273

c.

V

d.

V273

Question number: 19

» Thermodynamics » Thermal Equilibrium

Assertion-Reason▾

Assertion (Ꭺ)

The isothermal curves intersect each other at a certain point.

Reason (Ꭱ)

The isothermal change takes place slow; so the isothermal curves have very little slope.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 20

» Thermodynamics » Concept of Temperature

MCQ▾

Question

Work done by 0.1 mole of a gas at 27°C to double its volume at constant pressure is (R = 2 cal mol °K)

Choices

Choice (4) Response

a.

546 cal

b.

600 cal

c.

60 cal

d.

54 cal

Question number: 21

» Thermodynamics » Concept of Temperature

MCQ▾

Question

An ideal gas at 27°C is compressed adiabatically to 827 of its original volume. If γ=53 , then the rise in temperature

Choices

Choice (4) Response

a.

450 K

b.

405 K

c.

225 K

d.

375 k

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