Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>Competition Focus>Q 12

HARD

11th CBSE

IMPORTANT

Earn 100

Two closed bulbs of equal volume ( $V$ ) containing an ideal gas initially at pressure $P_{i}$ and temperature $T_{1}$ are connected through a narrow tube of negligible volume as shown in the figure below. The temperature of one of the bulbs is then raised to $T_{2}$ . The final pressure $P_{f}$ is

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Important Questions on States of Matter: Gases and Liquids

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>Competition Focus>Q 13

Containers

A

,

B

and

C

of equal volume contain oxygen, neon and methane respectively at the same temperature and pressure. The correct increasing order of their masses is

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>Competition Focus>Q 14

Average volume available to a molecule in a sample of a gas at STP is

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>Competition Focus>Q 15

Pressure of a mixture of

4 g

of

O_{2}

and

2 g

of

H_{2}

confined in a bulb of

1 litre

at

0 ° C

is

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>Competition Focus>Q 16

Which of the following volume

(V)

-temperature

(T)

plots represents the behaviour of one mole of an ideal gas at one atmospheric pressure ?

EASY

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>Competition Focus>Q 17

Containers A and B have same gas. Pressure, volume and temperature of A are all twice that of B. Then the ratio of the number of molecules of A and B are

EASY

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>Competition Focus>Q 18

A mixture of argon (

Ar

) and nitrogen (

N_{2}

) has a density of

1.40 g L^{- 1}

at STP. Mole fraction of

N_{2}

in the mixture is (Given atomic mass of

Ar

=

40

)

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>Competition Focus>Q 19

The density of a gas is

1.964 g {dm}^{- 3}

at

273 K

and

76 cm

Hg

. The gas is

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>Competition Focus>Q 20

If

10^{- 4} {dm}^{3}

of water is introduced into a

1.0 {dm}^{3}

flask at

300 K

, how many moles of water are in the vapour phase when equilibrium is established? (Given : Vapour pressure of

H_{2} O

at

300 K

is

3170 Pa

;

R = 8.314 {JK}^{- 1} {mol}^{- 1}

)