Physics Crash Course NEET>Chapter 9 - Behaviour of Perfect Gas and Kinetic Theory>Level 3>Q 12

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The root-mean-square $(R M S)$ speed of oxygen molecules $(O_{2})$ at a certain temperature $T$ (on Kelvin scale) is $V$ . If the temperature is doubled and oxygen gas dissociates into atomic oxygen, the $R M S$ speed becomes

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Important Questions on Behaviour of Perfect Gas and Kinetic Theory

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Physics Crash Course NEET>Chapter 9 - Behaviour of Perfect Gas and Kinetic Theory>Level 3>Q 13

The average kinetic energy of a gas molecule at

27 {}^{0}C

is

6.21 \times 10^{- 21} J

. Its average kinetic energy at

227 º C

will be

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Physics Crash Course NEET>Chapter 9 - Behaviour of Perfect Gas and Kinetic Theory>Level 3>Q 14

Six molecules speed

2 unit

,

5 unit

,

3 unit

,

6 unit

,

3 unit

and

5 unit

respectively. The rms speed is

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Physics Crash Course NEET>Chapter 9 - Behaviour of Perfect Gas and Kinetic Theory>Level 3>Q 15

Two soap bubbles of radii

x

and

y

coalesce to constitute a bubble of radius

z

. Then

z

is equal to

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Physics Crash Course NEET>Chapter 9 - Behaviour of Perfect Gas and Kinetic Theory>Level 3>Q 16

When the temperature of a gas increases by 1

℃

, its pressure increases by

0.4 %

(volume remains constant). What is its initial temperature?

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Physics Crash Course NEET>Chapter 9 - Behaviour of Perfect Gas and Kinetic Theory>Level 3>Q 17

On increasing the temperature of a gas filled in a closed container by

1^{o} C

, its pressure increases by

0.4 %

, then initial temperature of the gas is:

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Physics Crash Course NEET>Chapter 9 - Behaviour of Perfect Gas and Kinetic Theory>Level 3>Q 18

By what percentage should the pressure of a given mass of a gas be increased so as to decrease its volume by

10 %

at a constant temperature?

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Physics Crash Course NEET>Chapter 9 - Behaviour of Perfect Gas and Kinetic Theory>Level 3>Q 19

At constant temperature, the pressure of a gas is decreased by

20 %

. The percentage change in the volume

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Physics Crash Course NEET>Chapter 9 - Behaviour of Perfect Gas and Kinetic Theory>Level 3>Q 20

Three perfect gases at absolute temperature

T_{1}, T_{2}

and

T_{3}

are mixed. The masses of molecules are

m_{1}

,

m_{2}

and

m_{3}

and the number of molecules are

n_{1}, n_{2}

and

n_{3}

, respectively. Assuming no loss of energy, the final temperature of the mixture is