Question # 1

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

A graph b/w P and 1/V at constant temperature and number of moles is parallel to :

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Y-axis

Z-axis

X-axis

None of above

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

Cooling happens under the Joule Thomson Effect due to sudden

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Contraction

Absorption

Expansion

All of above

Gases show uniform behaviour towards their

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Internal conditions

External conditions

Internal and external conditions

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

Gases deviate from ideal behavior at high pressure. Which of the following is correct for non-ideality ?

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At high pressure, the gas molecules move in one direction only.

At high pressure, the collisions between the gas molecules are increased manifold.

At high pressure, the volume of gas becomes insignificant.

At high pressure, the inter molecular attraction become significant.

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 highest temperature at which a substance can exist as a liquid is called its

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Critical temperature

Zero temperature

Absolute temperature

None of above

In Boyle's law which of the following pair remains constant :

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Temperature and quality of a gas.

Pressure and quality of a gas.

Temperature and pressure

Temperature and quantity of a gas.

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 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

Which statement about gases is not correct ?

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The spread throughout the vessel.

Pressure is due to collision

There are large spaces between the molecules.

molecules are arranged regularly.

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.

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

Which Statement about gases is not correct?

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They spread throughout the vessel

Pressure is due to collision

There are larger spaces between the molecules

Molecules are arranged regularly

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

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

In Boyle's law which of the following pair remains constant

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Temperature and quality of a gas

Pressure and quality of a gas

Temperature and pressure

Temperature and quantity of a gas

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 order of the rate of diffusion of gases NH₃,SO₂, CL₂, and CO₂ IS :

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NH_{3 >}SO_{2 >}CL_{2 >}CO₂

NH_{3 >}CO_{2 >}SO_{2 >}CL₂

CL_{2 >}SO_{2 >}CO_{2 >}NH₃

NH_{3 >}CO₂_>CL_{2 >}SO₂

Which of the following is the simplest form of matter?

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Gaseous state

Liquid state

Solid state

All of above

Absolute temperature of a gas is proportional to

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Rotational kinetic energy

Translational kinetic energy

Vibrational kinetic energy

Potential energy

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

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 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

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 intramolecular forces in gases are

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Weak

Normal

Very weak

Strong

Cooling happens under the Joule Thomson Effect due to sudden :

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Contraction

Absortption

Expansion

All of above

In gases and liquids, temperature is the measure of

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Average translational kinetic energies of molecules

Average vibrational kinetic energies of molecules

Average rotational kinetic energies of molecules

None of above

Which of the following is the simplest form of matter?

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Gaseous state

Liquid State

Solid State

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

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

Number of molecules in one dm³of water is close to :

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6.02/22.4

12.04/22.4 *10²³

18/22.4*10²³

55.6*6.02*10²³* 10²³

A graph b/w P and 1/V at constant temperature and number of moles is parallel to :

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Y-axis

Z-axis

X-axis

None of above

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

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

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