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

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

EASY

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As the temperature is raised from $20 ℃ t o 40 ℃,$ the average kinetic energy of neon atoms changes by a factor of which of the following?

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Important Questions on States of Matter: Gases and Liquids

MEDIUM

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

The order of kinetic diameter of

N_{2}, CO

and

C_{2} H_{4}

is:

MEDIUM

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

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 Theory of Gases and Molecular Speeds

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

MEDIUM

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

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 Theory of Gases and Molecular Speeds

Points

I, I I

and

I I I

in the following plot respectively correspond to (

V_{m p} :

most probable velocity)

Question Image

EASY

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

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 Theory of Gases and Molecular Speeds

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 Theory of Gases and Molecular Speeds

The ratio of root-mean-square velocity of hydrogen at

50 K

to that of nitrogen at

500 K

is closest to

MEDIUM

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

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})

EASY

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

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 Theory of Gases and Molecular Speeds

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 Theory of Gases and Molecular Speeds

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: Gases and Liquids>Kinetic Theory of Gases and Molecular Speeds

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

EASY

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

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

EASY

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

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?

MEDIUM

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

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)

EASY

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

At room temperature, the average speed of Helium is higher than that of Oxygen by a factor of:

MEDIUM

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

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 Theory of Gases and Molecular Speeds

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: Gases and Liquids>Kinetic Theory of Gases and Molecular Speeds

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

As the temperature is raised from 20℃ to 40℃, the average kinetic energy of neon atoms changes by a factor of which of the following?

Important Questions on States of Matter: Gases and Liquids

Learn and Prepare for any exam you want !

As the temperature is raised from $20 ℃ t o 40 ℃,$ the average kinetic energy of neon atoms changes by a factor of which of the following?