NEET Physics: Questions 1476 - 1479 of 2098

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Question number: 1476

» Thermodynamics » Thermal Equilibrium

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

graphs of volume vs pressure various patterns formed

Graphs of Volume vs Pressure Various Patterns Formed

In above figure we shows the four different, volume vs pressure graph.

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 Cp=3.4×103calkg°C and at constant volume is Cv=2.4×10calkg°C . 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

» Thermodynamics » Concept of Temperature

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

» Kinetic Theory of Gases » Equation of State of a Perfect Gas

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.

4.16JCal

b.

4.20JCal

c.

4.18JCal

d.

4.22JCal

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