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

Consider the following statements:
I. Chemical properties of a substance do not change with the change of its physical state.

II. Gases have maximum thermal energy and minimum force of attraction out of three states i.e., Solid, Liquid and Gas.

III. Intermolecular forces are attractive as well as repulsive in nature.

The correct statement(s) is/are

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Important Questions on States of Matter: Gaseous and Liquid States

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

The order of kinetic diameter of

N_{2}, CO

and

C_{2} H_{4}

is:

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

What is the kinetic energy (in

ergs

) of the nitrogen molecule at

- 73 ° C

EASY

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

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: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

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: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

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: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

A gas molecule of mass

M

at the surface of the earth has kinetic energy equivalent to

0 ° C

. If it were to go up straight without colliding with any other molecules, how high would it rise? Assume that the height attained is much less than the radius of the earth. (

k_{B}

is Boltzmann constant)

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

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 :

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

How many times the volume of a diatomic gas should be increased reversibly and adiabatically in order to reduce its RMS velocity to half of its intial value.

EASY

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

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: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

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

EASY

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

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: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

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?

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

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.

EASY

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

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: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

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

HARD

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

Consider an ideal gas confined in an isolated closed chamber. As the gas undergoes an adiabatic expansion, the average time of collision between molecules increases as $V^{q}$ , where $V$ is the volume of the gas. The value of $q$ is:

$(γ = \frac{C_{P}}{C_{v}})$

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

According to kinetic molecular theory of gases, which of the following statements are correct?

a) The actual volume of the molecules is negligible in comparison to the empty space between them.

b) Collisions of gas molecules are inelastic.

c) At any particular time, different particles in the gas have the same speed and same kinetic energies.

d) Pressure is exerted by the gas as a result of collision of the particles with the walls of the container.

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

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: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

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: Gaseous and Liquid States>Kinetic Molecular Theory of Gas

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

Important Questions on States of Matter: Gaseous and Liquid States

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