Question # 1

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

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

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

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

Absolute temperature of a gas is proportional to

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Rotational kinetic energy

Translational kinetic energy

Vibrational kinetic energy

Potential energy

The graph between pressure and volume at constant temperature for a gas is

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Isobaric

Isothermal

Isotherm

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.

Gases show uniform behaviour towards their

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Internal conditions

External conditions

Internal and external conditions

None 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

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

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

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Evaporation

Effusion

Conduction

Difusion

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 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

In solids, the temperature of is the measure of

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Rotational kinetic energies

transnational kineticenergies

Vibrationalkineticenergies

None of the 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

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 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 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 intramolecular forces in gases are

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Weak

Normal

Very weak

Strong

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

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

In Solids, the temperature is the measure of

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Rotational kinetic energies

Translational kinetic energies

Vibrational kinetic energies

None 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.

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

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

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

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 shows uniform behavior toward their :

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Internal conditions

External conditions

Internal and external conditions

None of above

Liquids are less common than :

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Solids

Plasmas

Gases

All of above

The rate of diffusion of a gas is :

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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

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