Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 32

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A liquid is in equilibrium with its vapour at its boiling point. On the average the molecules in the two phases have equal:

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Important Questions on States of Matter: Gases and Liquids

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Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 33

If the pressure of a gas contained in a closed vessel is increased by

0.4 %

, when heated by

1 ° C

, its initial temperature must be:

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Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 34

If a mixture containing $3$ moles of hydrogen and $1$ mole of nitrogen is converted completely into ammonia, the ratio of initial and final volume under the same temperature and pressure would be:

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Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 35

{SO}_{2}

at

STP

contained in a flask was replaced by

O_{2}

under identical conditions of pressure, temperature and volume. Then, the weight of

O_{2}

will be ____ of

{SO}_{2}

.

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Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 36

Equal weights of methane and hydrogen are mixed in an empty container at

25 ° C

. The fraction of the total pressure exerted by hydrogen is

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Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 37

A

0.5 {dm}^{3}

flask contains the gas

A

, and a

1 {dm}^{3}

flask contains the gas

B

at the same temperature. If the density of

A = 3 g / {dm}^{3}

and that of

B = 1.5 g / {dm}^{3}

, and the molar mass of

A = 1 / 2

of

B

, the ratio of the pressure exerted by the gases is

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Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 38

Assuming that the

O_{2}

molecule is spherical with a radius of

2 Å

, the percentage of the volume of the

O_{2}

molecules to the total volume of the gas at

S . T . P .

is

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Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 39

Temperature at which

r . m . s

speed of

O_{2}

is equal to that of neon at

300 K

is:

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Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 40

The kinetic energy of

N

molecules of

O_{2}

is

x

Joule

at

- 123 ° C

. Another sample of

O_{2}

at

27 ° C

has a kinetic energy of

2 x

. The latter sample contains _____ molecules of

O_{2}

.