Question # 1

All gases can be compressed by

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Keeping constant pressure

Decreasing pressure

Increasing pressure

None of above

Equal masses of methane and oxygen are mixed in an empty container at 25°CThe fraction of total pressure exerted by oxygen is :

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1/2

8/9

1/9

16/17

Gases of air always remain in random motion and do not settle due to :

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Difference in molecular masses of air gases.

Difference in partial pressure of gas molecules.

Unequal number of different gas molecules.

Elastic collision of gas molecules.

The ratio of volume to temperature on Kelvin scale is constant according to

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Charle's law

Newton's law

Coulomb's law

Boyle's law

The deviation of a gas from ideal behavior is maximum at :

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-10°C and 5.0 atm

-10°C and 2.0 atm

100°C and 2.0 atm

0°C and 2.0 atm

Gases exert pressure on walls of container because the gas molecules

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Obey gas laws

Have definite volume

Collide with the walls of container

Collide with each other

The molar value of CO₂is maximum at :

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STP

127°C and 1 atm

0°C and 2 atm

273°C and 2 atm

In Boyle's law which of the following pair is variable :

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Temperature and quantity of a gas.

Pressure and volume

Volume and quantity of a gas.

Pressure and quantity of a gas.

Boyle's law doesn't fail even :

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Temperature is extremely high

Pressure is extremely high

Mixture of gas is taken

All of above

Boyle's law does not fall even

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Temperature is extremely high

Pressure is extremely high

Mixture of gases is taken

all of above

Liquids are less common than :

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Solids

Plasmas

Gases

All of above

Gases exert pressure on walls of container because the gas molecules :

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Obey gas laws.

Have definite volume.

Collide with the walls of container.

Collide with each other.

Which of the following is the simplest form of matter?

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Gaseous state

Liquid state

Solid state

All of above

According to Boyle's law, which parameters give a straight line parallel to axis-s, when we plot a graph between:

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V and T

P and V

P and 1/V

P and PV

All gases can be compressed by :

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Keeping constant pressure

Decreasing pressure

Increasing pressure

None of the above

Cooling happens under the Joule Thomson Effect due to sudden :

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Contraction

Absortption

Expansion

All of above

For a gas obeying Boyle's law if pressure is doubled, the volume becomes

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Remains constant

Double

One half

None of above

The density of a gas is directly proportional to pressure, inversely proportional to temperature and directly proportional to

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Viscosity

Molar mass

Momentum

All of above

For a gas obeying Boyle's law if pressure is doubled, the volume becomes :

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Remain constant

Double

One half

None of above

The movement of gas molecules from a region of high pressure to vacuum is called

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Evaportation

Effusion

Conduction

Diffusion

If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of gas will :

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remain unchanged

increase four times

reduce to 1/4

be doubled

Keeping the temperature constant, if the gas is expanded

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kinetic energy of molecules will increase

Number of gas molecules increases

Temperature will increases

Pressure will decrease

The product of pressure and volume remains constant when temperature and quantity of gas is

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zero

variable

kept constant

None of these

If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will be

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Remain unchanged

Doubled

Reduced

Increased four times

A real gas obeying van der Waals' equation will resemble ideal gas if :

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both 'a' and 'b' are large

both 'a' and 'b' are small

'a' is small and 'b' is large

'a' is large and 'b' is small

Which of the following will have the same number of molecules at STP ?

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280 CM³ of CO² and 280 CM³ of N₂O

11.2 dm3 of O₂ and 32 g of O₂

44 g of CO₂ and 11.2 dm³ of CO

28 g of N2 and 5.6 dm³ of oxygen

How should condition be changed to prevent the volume of a given gas from expanding whine its mass is increased ?

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Temperature is lowered and pressure is increased

Temperature is increasedand pressure is lowered

Temperature and pressure both are lowered

Temperature and pressure both are increased

The relationships between volume of a given amount of gas and the prevailing conditions of temperature and pressure are

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Charle's Law

Graham's Law

Boyle's Law

Gas Laws

In gases and liquids, temperature is the measure of :

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Average transnational kinetic energies of molecules.

Average vibrational kinetic energies of molecules.

Average rotational kinetic energies of molecules.

None of above

A graph between P and 1/V at constant temperature and number moles of a gas meets the

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y-axis

x-axis

origin

none of above

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