Two ideal polyatomic gases at temperatures T 1 and T 2 are mixed so that there is no loss of energy. If F 1 and F 2 , m 1 and m 2 , n 1 and n 2 be the degrees of freedom, masses, number of molecules of the first and second gas respectively, the temperature of mixture of these two gases is:

n 1 F 1 T 1 + n 2 F 2 T 2 n 1 F 1 + n 2 F 2

n 1 F 1 T 1 + n 2 F 2 T 2 F 1 + F 2

n 1 F 1 T 1 + n 2 F 2 T 2 n 1 + n 2

According to the assumptions made in the kinetic theory of gases, when two molecules of a gas collide with each other then

both kinetic energy and momentum are conserved.

neither kinetic energy nor momentum is conserved.

momentum is conserved but kinetic energy is not conserved.

kinetic energy is conserved but momentum is not conserved.

E M B I B E

Physics Crash Course NEET>Chapter 9 - Behaviour of Perfect Gas and Kinetic Theory>Level 1>Q 61

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IMPORTANT

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The ratio of average translational kinetic energy to the rotational kinetic energy of a diatomic molecule at temperature $T$ is

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Important Questions on Behaviour of Perfect Gas and Kinetic Theory

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NEET

IMPORTANT

Physics Crash Course NEET>Chapter 9 - Behaviour of Perfect Gas and Kinetic Theory>Level 1>Q 62

A gas mixture consists of

2

moles of oxygen and

4

moles of argon at temperature

T

. Neglecting all vibrational modes, the total internal energy of the system is

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Physics Crash Course NEET>Chapter 9 - Behaviour of Perfect Gas and Kinetic Theory>Level 1>Q 63

Figure shows graphs of pressure vs density for an ideal gas at two temperatures $T_{1}$ and $T_{2} .$

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Physics Crash Course NEET>Chapter 9 - Behaviour of Perfect Gas and Kinetic Theory>Level 1>Q 66

One half mole each of nitrogen, oxygen and carbon dioxide are mixed in enclosure of volume

5 litres

and temperature

27^{o} C

. The pressure exerted by mixture is (

R = 8 .31 J {mol}^{- 1} K^{- 1}

)

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IMPORTANT

Physics Crash Course NEET>Chapter 9 - Behaviour of Perfect Gas and Kinetic Theory>Level 1>Q 69

In the figure, the volume of container $X$ is double of the volume of container $Y$ . Both are filled with ideal gas. The temperature of $X$ is $200 K$ and that of $Y$ is $400 K$ . If the mass of gas in $X$ is $m$ , then the mass of gas in $Y$ will be?

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Physics Crash Course NEET>Chapter 9 - Behaviour of Perfect Gas and Kinetic Theory>Level 1>Q 70

A gas molecule of mass

M

at the surface of the earth has kinetic energy equivalent to

0 ° C

. If it were to go up straight without colliding with any other molecules, how high would it rise? Assume that the height attained is much less than the radius of the earth. (