Question # 1

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

In Solids, the temperature is the measure of

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Rotational kinetic energies

Translational kinetic energies

Vibrational kinetic energies

None 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

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

Absolute temperature of a gas is proportional to

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Rotational kinetic energy

Translational kinetic energy

Vibrational kinetic energy

Potential energy

The rate of diffusion of a gas in

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Inversely proportional to its density

Inversely proportional to square root of its molecular mass

Directly proportional to molecular mass

Directly proportional to its density

The intramolecular forces in gases are

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Weak

Normal

Very weak

Strong

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 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

Cooling happens under the Joule Thomson Effect due to sudden :

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Contraction

Absortption

Expansion

All 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

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

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Evaporation

Effusion

Conduction

Difusion

Which of the following is the simplest form of matter?

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Gaseous state

Liquid state

Solid state

All 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

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

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Evaportation

Effusion

Conduction

Diffusion

Which of the following is the simplest form of matter?

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Gaseous state

Liquid State

Solid State

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

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

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

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.

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.

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

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

Gases show uniform behaviour towards their

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Internal conditions

External conditions

Internal and external conditions

None of above

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

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 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

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

At constant temperature when pressure of a gas is plotted against volume, the curve is

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Slanting straight line

Parabolic

Staight line, parallel to pressure axis

OF neither type

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

A graph between P and PV at constant temperature and number of mole is parallel to

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y axis

z axis

x axis

pressure axis

Cooling happens under the Joule Thomson Effect due to sudden

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Contraction

Absorption

Expansion

All of above

According to Boyle's law. which parameters give a straight line parallel to x-axis, 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

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 relation ships b/w volume of given amount of gas and prevailing conditions of temperature and pressure are :

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Charles's law

Graham's law

Boyle's law

Gas law

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