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NEET • PHYSICS • KINETIC THEORY OF GASES

Kinetic theory of gases practice · Easy

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31 Easy

31 of 37

Application +4 | -1

A sample contains mixture of helium and oxygen gas. The ratio of root mean square speed of helium and oxygen in the sample, is :

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Correct option: B

\frac{2 \sqrt{2}}{1}

Option B (

\frac{{2 \sqrt{{2}}}}{{1}}

) is correct because the ratio of RMS speeds is inversely proportional to the square root of the molar masses.

32 Easy

32 of 37

Application +4 | -1

The root mean square speed of hydrogen molecules at a certain temperature is

300 \mathrm{~m} / \mathrm{s}

. If the temperature is doubled and hydrogen gas dissociates into atomic hydrogen, the r.m.s. speed will become

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Correct option: C

600 \mathrm{~m} / \mathrm{s}

Option C (

600 \mathrm{~m} / \mathrm{s}

) is correct because when the temperature is doubled and hydrogen dissociates, the r.m.s. speed doubles.

33 Easy

33 of 37

Understanding +4 | -1

The phenomenon of Brownian movement may be taken as evidence of

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Correct option: A

Kinetic theory of matter

The correct answer is A because Brownian movement provides direct evidence for the kinetic theory of matter, showing the random motion of particles due to molecular collisions.

34 Easy

34 of 37

Application +4 | -1

In a container,

1 \mathrm{~g}

of hydrogen and

1 \mathrm{~g}

of oxygen are taken. Find the ratio of hydrogen pressure to oxygen pressure.

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Correct option: A

Option A (16) is correct because the pressure ratio is directly proportional to the mole ratio, which is determined by the mass and molar mass of each gas.

35 Easy

35 of 37

Application +4 | -1

In the process

P V=

constant, pressure

(P)

versus density

(\rho)

, graphs of an ideal gas is

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Correct option: C

A straight line passing through origin

Option C (A straight line passing through origin) is correct because the relation

PV = constant

can be rewritten as

P = constant * \rho

, which is the equation of a straight line passing through the origin.

36 Easy

36 of 37

Understanding +4 | -1

The temperature of the gas is a measure of

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Correct option: A

The average translational kinetic energy of the
gas molecules

The correct answer is A because the temperature of a gas is directly proportional to the average translational kinetic energy of its molecules.

37 Easy

37 of 37

Remembering +4 | -1

The relation between rms velocity,

v_{\text {rms}}

and the most probable velocity,

v_{{mp}}

of a gas is

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Correct option: B

v_{\mathrm{rms}}=\sqrt{\frac{3}{2}} v_{{mp}}

Option B (

v_{\mathrm{rms}}=\sqrt{\frac{3}{2}} v_{{mp}}

) is correct because it represents the correct relationship between RMS velocity and most probable velocity.

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Showing 31-37 of 37 questions

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