1
KCET 2023
MCQ (Single Correct Answer)
+1
-0

The $$p$$-$$V$$ diagram of a Carnot's engine is shown in the graph below. The engine uses 1 mole of an ideal gas as working substance. From the graph, the area enclosed by the $$p$$-$$V$$ diagram is [The heat supplied to the gas is 8000 J]

A
1200 J
B
2000 J
C
3000 J
D
1000 J
2
KCET 2023
MCQ (Single Correct Answer)
+1
-0

The speed of sound in an ideal gas at a given temperature $$T$$ is $$v$$. The rms speed of gas molecules at that temperature is $$v_{\text {rms }}$$. The ratio of the velocities $$v$$ and $$v_{\text {rms }}$$ for helium and oxygen gases are $$X$$ and $$X^{\prime}$$ respectively. Then, $$\frac{X}{X^{\prime}}$$ is equal to

A
$$\frac{21}{\sqrt{5}}$$
B
$$\frac{5}{\sqrt{21}}$$
C
$$\sqrt{\frac{5}{21}}$$
D
$$\frac{21}{5}$$
3
KCET 2023
MCQ (Single Correct Answer)
+1
-0

Pressure of ideal gas at constant volume is proportional to .........

A
force between the molecules
B
average potential energy of the molecules
C
total energy of the gas
D
average kinetic energy of the molecules
4
KCET 2022
MCQ (Single Correct Answer)
+1
-0

"Heat cannot be flow itself from a body at lower temperature to a body at higher temperature". This statement corresponds to

A
conservation of momentum
B
conservation of mass
C
first law of thermodynamics
D
second law of thermodynamics
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