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A molecule of gas in a container hits one wall $(1)$ normally and rebounds back. It suffers no collision and hits the opposite wall $(2)$ which is at an angle of $30 °$ with wall $1$ . Assuming the collisions to be elastic and the small collision time to be the same for both the walls, the magnitude of average force by wall $2 (F_{2})$ provided to the molecule during collision satisfy: (magnitude of average force by wall $1$ is $F_{1}$ )

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Important Questions on Kinetic Theory of Gases and Thermodynamics

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KVPY Aptitude Test - Stream SA

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 11 - Kinetic Theory of Gases and Thermodynamics>Exercise 2>Q 3

On a day during the Monsoon season, the relative humidity at a place is

90 %

and the temperature is

15 ° C

. The saturation vapour pressure of water at this temperature is

0.0169 \times 10^{5} Pa

. The partial pressure of water vapour in the air on that day is

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 11 - Kinetic Theory of Gases and Thermodynamics>Exercise 2>Q 4

We sit in the room with windows open. Then

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KVPY Aptitude Test - Stream SA

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 11 - Kinetic Theory of Gases and Thermodynamics>Exercise 2>Q 5

The number of air molecules in a

(5 m \times 5 m \times 4 m)

room at standard temperature and pressure is of the order of:

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 11 - Kinetic Theory of Gases and Thermodynamics>Exercise 2>Q 6

In a thermally isolated system. Two boxes filled with an ideal gas are connected by a valve. When the valve is in closed position, states of the box

1

and

2

. respectively, are

(1 atm, V, T)

and

(0.5 atm, 4 V, T)

. When the valve is opened, the final pressure of the system is approximately.

EASY

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 11 - Kinetic Theory of Gases and Thermodynamics>Exercise 2>Q 7

A coolant in a chemical or nuclear plant is a liquid that is used to prevent different parts of a plant from getting too hot. One important property of coolant is that it

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 11 - Kinetic Theory of Gases and Thermodynamics>Exercise 2>Q 8

A solid cube and a solid sphere of identical material and equal masses are heated to the same temperature and left to cool in the same surroundings. Then

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 11 - Kinetic Theory of Gases and Thermodynamics>Exercise 2>Q 9

In the Arctic region hemispherical houses called igloos are made of ice. It is possible to maintain inside an Igloo as high as

20 ° C

because

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 11 - Kinetic Theory of Gases and Thermodynamics>Exercise 2>Q 10

An ideal gas filled in a cylinder occupies volume

V

. The gas is compressed isothermally to the volume

\frac{V}{3}

. Now the cylinder valve is opened and the gas is allowed to leak keeping temperature same. What percentage of the number of molecules escape to bring the pressure in the cylinder back to its original value.

Important Questions on Kinetic Theory of Gases and Thermodynamics

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