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Rate of effusion of a gas through a fine hole in a container placed in vaccum is given by (Notation have their usual meaning)

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Important Questions on States of Matter: Gases and Liquids

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Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

The ratio of rates of diffusion of oxygen and an unknown gas is

1 : 4

. The unknown gas is

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

Which of the following statement is not true?

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

Two gases

A

and

B

are released from the two ends of a tunnel of length

100 m

. A travels

40 \min

, before meeting the gas

B

in the tunnel. If the molecular weight of

B

18

, what is the molecular weight of

A

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

At same temperature and pressure, the rate of diffusion of gas

' X'

3 \sqrt{3}

times that of a gaseous hydrocarbon of molar mass

54 g {mol}^{- 1}

. The molar mass of

X

g {mol}^{- 1}

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

Sulphur dioxide and oxygen were allowed to diffuse through a porous partition.

20 {dm}^{3}

{SO}_{2}

diffuses through the porous partition in

60

seconds. The volume of

O_{2}

{dm}^{3}

which diffuses under the similar condition in

30

seconds will be (atomic mass of sulphur

= 32 u

);

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

A specific volume of

H_{2}

requires

24 s

to diffuse out of a container. The time required by an equal volume of

O_{2}

to diffuse out under identical conditions, is

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

The rate of diffusion of methane at a given temperature is twice that of gas

X

. The molecular weight of gas

X

HARD

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

10

litre cylinder contains equal volumes of

H_{2}

and

He

. If the mixture is allowed to diffuse from an opening, estimate the percent composition of the output gas. (Assume ideal behaviour of gas mixture)

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

Diffusion of

{CH}_{4} (g)

and

O_{2} (g)

occurs under similar conditions, then the ratio of their rates of diffusion is

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

According to Graham's Law, the rate of diffusion of

C O, O_{2}, N_{2} a n d C O_{2}

follows the order:

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escape in the time required for one-half of the hydrogen to escape?

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

Diffusion of helium gas is four times faster than

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

Pressure in a bulb dropped from 2000 to 1500 mm in 47 minute when the contained oxygen leaked through a small hole. The bulb was then completely evacuated. A mixture of oxygen and another gas of molecular weight 79 in molar ratio 1:1 at a total pressure of 4000 mm was introduced. Find the molar ratio of two gases remaining in the bulb after a period of 74 minute.

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Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

A gaseous compound X contained 44.4% C , 51.9% N and 3.7% H. Under like conditions

30 c m^{3}

of X diffused through a pinhole in 25 sec and the same volume of

H_{2}

diffused in 4.81 sec. The molecular formula of X is

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

At what temperature will be rate of effusion of

N_{2}

be 1.625 times the rate of effusion of

S O_{2}

500^{0} C

HARD

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

A lecture room contains 50 rows of seats - numbered 1 through 50 from front to back. Ammonia is released from the front of the room at the same instant that hydrogen chloride gas is released from the back. Assuming Graham's law of diffusion, over which row of students will a white cloud of ammonium chloride from? (MW: NH₃ = 17.0; HCl = 36.5, NH₄ Cl = 53.5 g/mol)

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

Calculate the relative rate of effusion of

O_{2}

{CH}_{4}

through a container containing

O_{2}

and

{CH}_{4}

3 : 2

mass ratio.

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Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

The rate of diffusion of

O_{2}

and

H_{2}

at same P and T are in the ratio:

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

The ratio of rates of effusion of hydrogen and deuterium under similar conditions is:

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Graham's DIffusion Law

A given volume of ozonised oxygen ( Containing

60 %

oxygen by volume) required

220 \sec

to effuse which an equal volume of oxygen took

200 \sec

only under the conditions. If density of

O_{2}

1.6 g / L

then find density of

O_{3}

Rate of effusion of a gas through a fine hole in a container placed in vaccum is given by (Notation have their usual meaning)

Important Questions on States of Matter: Gases and Liquids

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