# NEET Physics: Questions 1476 - 1479 of 2098

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## Question number: 1476

MCQ▾

### Question

In the diagrams (i) to (iv) of variation of volume with changing pressure is shown. A gas is taken along the path ABCD. The change in internal energy of the gas will be

### Choices

Choice (4) Response

a.

Negative in cases (i), (ii) and (iii) but zero in case (iv)

b.

Positive in cases (i), (ii) and (iii) but zero in case (rv)

c.

Positive in all cases (i) to (iv)

d.

Zero in all cases

## Question number: 1477

» Thermodynamics » Laws of Thermodynamics » First Law of Thermodynamics

MCQ▾

### Question

The specific heat of hydrogen gas at constant pressure is and at constant volume is . If one kilogram hydrogen gas is heated from 10°C to 20°C at constant pressure, the external work done on the gas to maintain it at constant pressure is

### Choices

Choice (4) Response

a.

10 4 Cal

b.

5 ⨯ 10 3 Cal

c.

10 5 Cal

d.

10 3 Cal

## Question number: 1478

MCQ▾

### Question

A scientist says that the efficiency of his heat engine which operates at source temperature 120°C and sink temperature 27°C is 26%, then

### Choices

Choice (4) Response

a.

It is possible but less probable

b.

It is quite probable

c.

It is impossible

d.

Data are incomplete

## Question number: 1479

MCQ▾

### Question

The value of the gas constant (R) calculated from the perfect gas equation is 8.32 Joule/gm mole K, whereas in value calculated from the knowledge of C P and C V of the gas is 1.98 Cal/gm mole K. From this data, the value of J is

### Choices

Choice (4) Response

a.

b.

c.

d.