Van der Waal's equation for a gas is stated as, P = nRT V - nb - a n V 2 . This equation reduces to the perfect gas equation, P = nRT V When,

temperature is sufficiently high and pressure is low.

both temperature and pressure are very low.

both temperature and pressure are very high.

temperature is sufficiently low and pressure is high.

MEDIUM

JEE Main

IMPORTANT

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A mixture of gases $O_{2}, H_{2}$ and $C O$ are taken in a closed vessel containing charcoal. The graph that represents the correct behaviour of pressure with time is:

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Important Questions on States of Matter: Gases and Liquids

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 3 - States of Matter: Gases and Liquids>JEE Main - 9th January 2019 Shift 1>Q 4

0.5

moles of gas

A

and

x

moles of gas

B

exert a pressure of

200 P a

in a container of volume

10 m^{3}

1000 K

. Given,

R

is the gas constant in

{JK}^{- 1} {mol}^{- 1}, x

is:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 3 - States of Matter: Gases and Liquids>JEE Main - 9th April 2019 Shift 2>Q 5

At a given temperature

T,

gases

N e, A r, X e

and

K r

are found to deviate from ideal gas behaviour. Their equation of state is given as

p = \frac{R T}{V - b}

T .

Here,

b

is the van der Waals constant. Which gas will exhibit steepest increase in the plot of

Z

(compression factor) vs

p ?

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 3 - States of Matter: Gases and Liquids>JEE Main - 9th April 2019 Shift 1>Q 6

Consider the van der Waal's constants,

a

and

b,

for the following gases.

Gas	$A r$	$N e$	$K r$	$X e$
$a / (a t m d m^{6} m o l^{- 2})$	$1.3$	$0.2$	$5.1$	$4.1$
$b / (10^{- 2} d m^{3} m o l^{- 1})$	$3.2$	$1.7$	$1.0$	$5.0$

Which gas is expected to have the highest critical temperature?

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 3 - States of Matter: Gases and Liquids>JEE Main - 9th April 2017>Q 7

300 K

, the density of a certain gaseous molecule at

2

bar is double to that of dinitrogen

(N_{2})

4

bar. The molar mass of the gaseous molecule is

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 3 - States of Matter: Gases and Liquids>JEE Main - 9th April 2016>Q 8

At very high pressures, the compressibility factor of one mole of a gas is given by:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 3 - States of Matter: Gases and Liquids>JEE Main - 9th April 2016>Q 9

Which intermolecular force is most responsible in allowing xenon gas to liquefy?

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 3 - States of Matter: Gases and Liquids>JEE Main - 9th April 2014>Q 10

The temperature at which oxygen molecules have the same root mean square speed as helium atoms have at 300 K is : (Atomic masses : He = 4 u, O = 16 u)

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 3 - States of Matter: Gases and Liquids>JEE Main - 9th April 2014>Q 11

Van der Waal's equation for a gas is stated as,

P = \frac{nRT}{V - nb} - a {(\frac{n}{V})}^{2}

.

This equation reduces to the perfect gas equation,

P = \frac{nRT}{V}

When,

A mixture of gases O2,H2 and CO are taken in a closed vessel containing charcoal. The graph that represents the correct behaviour of pressure with time is:

Important Questions on States of Matter: Gases and Liquids

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A mixture of gases $O_{2}, H_{2}$ and $C O$ are taken in a closed vessel containing charcoal. The graph that represents the correct behaviour of pressure with time is: