# Thermodynamics (NEET Physics): Questions 66 - 71 of 86

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## 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.

## Question number: 68

» 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

## Passage

V-T graph of a process of monoatomic ideal gas is as shown in figure.

## Question number: 69 (1 of 3 Based on Passage) Show Passage

» Thermodynamics » Laws of Thermodynamics » Second Law of Thermodynamics

MCQ▾

### Question

Heat is supplied to the gas in process (s) -

### Choices

Choice (4) Response

a.

DA, AB and DC

b.

AB and BC only

c.

DA only

d.

DA and AB only

## Question number: 70 (2 of 3 Based on Passage) Show Passage

» Thermodynamics » Laws of Thermodynamics » Second Law of Thermodynamics

MCQ▾

### Question

Sum of work done by the gas in process ABCD is –

### Choices

Choice (4) Response

a.

negative

b.

data is insufficient

c.

zero

d.

positive

## Question number: 71 (3 of 3 Based on Passage) Show Passage

» Thermodynamics » Laws of Thermodynamics » Second Law of Thermodynamics

MCQ▾

### Question

Change in internal energy of the gas is zero in process (s) –

### Choices

Choice (4) Response

a.

DA and BC only

b.

DA, AB and BC

c.

DA only

d.

DA and AB only

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