Question # 1

The intramolecular forces in gases are

Choose an answer

Weak

Normal

Very weak

Strong

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

Choose an answer

Viscosity

Molar mass

Momentum

All 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 :

Choose an answer

1/2

8/9

1/9

16/17

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

Choose an answer

Isobaric

Isothermal

Isotherm

None of above

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

Choose an answer

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 density of a gas is directly and volume at constant temperature for a gas is

Choose an answer

Isobaric

Isothermal

Isotherm

None of above

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

Choose an answer

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

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

Choose an answer

zero

variable

kept constant

None of these

The molar value of CO₂is maximum at :

Choose an answer

STP

127°C and 1 atm

0°C and 2 atm

273°C and 2 atm

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

Choose an answer

V and T

P and V

P and 1/V

P and PV

Gases show uniform behaviour towards their

Choose an answer

Internal conditions

External conditions

Internal and external conditions

None of above

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

Choose an answer

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 of the following is the simplest form of matter?

Choose an answer

Gaseous state

Liquid state

Solid state

All of above

Boyle's law doesn't fail even :

Choose an answer

Temperature is extremely high

Pressure is extremely high

Mixture of gas is taken

All of above

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

Choose an answer

Temperature and quality of a gas.

Pressure and quality of a gas.

Temperature and pressure

Temperature and quantity of a gas.

In Solids, the temperature is the measure of

Choose an answer

Rotational kinetic energies

Translational kinetic energies

Vibrational kinetic energies

None of above

The rate of diffusion of a gas is :

Choose an answer

Inversely proportional to its density

Inversely proportional to square root of its molecular mass

Directly proportional to molecular mass

Directly proportional to its density

Keeping the temperature constant, if the gas is expanded

Choose an answer

kinetic energy of molecules will increase

Number of gas molecules increases

Temperature will increases

Pressure will decrease

The rate of diffusion of a gas in

Choose an answer

Inversely proportional to its density

Inversely proportional to square root of its molecular mass

Directly proportional to molecular mass

Directly proportional to its density

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

Choose an answer

Remain unchanged

Doubled

Reduced

Increased four times

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

Choose an answer

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

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

Choose an answer

Evaportation

Effusion

Conduction

Diffusion

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

Choose an answer

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

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

Choose an answer

Charle's Law

Graham's Law

Boyle's Law

Gas Laws

Absolute temperature of a gas is proportional to

Choose an answer

Rotational kinetic energy

Translational kinetic energy

Vibrational kinetic energy

Potential energy

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

Choose an answer

Temperature and quantity of a gas

Pressure and Volume

Volume and quantity of a gas

Pressure and quantity of a gas

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

Choose an answer

remain unchanged

increase four times

reduce to 1/4

be doubled

In gases and liquids, temperature is the measure of :

Choose an answer

Average transnational kinetic energies of molecules.

Average vibrational kinetic energies of molecules.

Average rotational kinetic energies of molecules.

None of above

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

Choose an answer

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

Choose an answer

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.

Liquids are less common than

Choose an answer

Solids

Plasmas

Gases

All of above

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

Choose an answer

Charles's law

Graham's law

Boyle's law

Gas law

Gases exert pressure on walls of container because the gas molecules

Choose an answer

Obey gas laws

Have definite volume

Collide with the walls of container

Collide with each other

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

Choose an answer

Evaporation

Effusion

Conduction

Difusion

Which Statement about gases is not correct?

Choose an answer

They spread throughout the vessel

Pressure is due to collision

There are larger spaces between the molecules

Molecules are arranged regularly

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

Choose an answer

y-axis

x-axis

origin

none of above

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

Choose an answer

Slanting straight line

Parabolic

Staight line, parallel to pressure axis

OF neither type

More Classes

Other Links

ECAT Chemistry Chapter 3 Gases Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer