For gaseous state, if most probable speed is denoted by C * , average speed by C ¯ and root mean square speed by C , then for many molecules, what is the ratios of these speeds?

C * : C - : C = 1 : 1 .128 : 1 .225

C * : C - : C = 1 : 1 .225 : 1 .128

C * : C - : C = 1 .225 : 1 .128 : 1

C * : C - : C = 1 .128 : 1 .225 : 1

Identify the correct labels of A , B and C in the following graph from the options given below: Root mean square speed V r m s ; most proable speed V m p ; Average speed V a v

A - V mp ; B - V av ; C - V rms

A - V mp ; B - V rms ; C - V av

A - V av ; B - V rms ; C - V mp

A - V rms ; B - V mp ; C - V av

EASY

Earn 100

Write the effect of the molar mass on Maxwell-Boltzmann's distribution curve of molecular speeds.

Important Questions on States of Matter: Gases and Liquids

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

Two vessels separately contain two ideal gases

A

and

B

at the same temperature, the pressure of

A

being twice that of

B

. Under such conditions, the density of

A

is found to be

1.5

times the density of

B

. The ratio of molecular weights of

A

and

B

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

What is the kinetic energy (in

ergs

) of the nitrogen molecule at

- 73 ° C

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

Two flasks

A

and

B

have equal volumes.

A

is maintained at

300 K

and

B

600 K

. Equal masses of

H_{2}

and

{CO}_{2}

are taken in flasks

A

and

B

respectively. Find the ratio of total

K . E

of gases in flask

A

to that of

B

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

A molecule of

{SO}_{2}

is two times heavier than a

O_{2}

molecule. At

298 K

the average kinetic energy of

{SO}_{2}

molecule is

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

Which of the following is not an assumption of the kinetic theory of gases?

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

What is the average kinetic energy of molecules of an ideal gas leaking freely through an orifice of a container which has

N

molecules at pressure

P

in volume

V

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

Among the following, the plot that shows the correct marking of most probable velocity

(V_{MP}),

average velocity

(\bar{V}),

and root mean square velocity

(V_{RMS})

is :

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

For gaseous state, if most probable speed is denoted by

C^{*}

, average speed by

\bar{C}

and root mean square speed by

C

, then for many molecules, what is the ratios of these speeds?

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

Number of molecules in a volume of

4 {cm}^{3}

of a perfect monoatomic gas at some temperature

T

and at a pressure of

2 cm

of mercury is close to? (Given, mean kinetic energy of a molecule (at T) is

4 \times 10^{- 14} erg, g = 980 cm s^{- 2}

density of mercury

= 13.6 g {cm}^{- 3}

)

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

Predict the correct order of rate of diffusion of the following molecules.

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

Select from the box, the correct gas law related to the given situation.

Boyle's law, Charles law, Avagadro's law

An inflated balloon kept at sunlight bursts after some time.

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

Points

I, I I

and

I I I

in the following plot respectively correspond to (

V_{m p} :

most probable velocity)

Question Image

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

The speed of the gas molecules contained in a closed vessel at fixed temperature and pressure is the same.

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

The order of kinetic diameter of

N_{2}, CO

and

C_{2} H_{4}

is:

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

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>Kinetic Molecular Theory of Gases

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

);

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

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)

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

The kinetic energy in

J

1

mole of

N_{2}

27 ° C

is:

(R = 8.314 J {mol}^{- 1} K^{- 1})

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

Identify the correct labels of

A, B

and

C

in the following graph from the options given below:
Question Image

Root mean square speed

(V_{r m s});

most proable speed

(V_{m p});

Average speed

(V_{a v})

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Kinetic Molecular Theory of Gases

Which of the following statement(s) (are) correct regarding the root-mean-square speed

(U_{r m s})

and average translational kinetic energy

(E_{av})

of a molecule in a gas at equilibrium?

Write the effect of the molar mass on Maxwell-Boltzmann's distribution curve of molecular speeds.

Important Questions on States of Matter: Gases and Liquids

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