• Gaseous State (Class XI / XII)
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Gaseous State (Class XI / XII)

Description: gas Gaseous StateIdeal Gas Equation/Kinetic Molecular TheoryThe Gas LawsCritical Temperature
Number of Questions: 15
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Tags: gas Gaseous State Ideal Gas Equation/Kinetic Molecular Theory The Gas Laws Critical Temperature
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Which gas is heavier than air?

  1. Oxygen

  2. Ammonia

  3. Methane

  4. Nitrogen

  5. -

Show answer
Correct Option: A
Explanation:

It is heavier than air.

What is the criteria at which a gas will approach ideal behaviour?

  1. Low temperature and low pressure

  2. High temperature and low pressure

  3. Low temperature and high pressure

  4. High temperature and high pressure

  5. -

Show answer
Correct Option: B
Explanation:

This should cause the gas to behave more ideally.

Which of the following entities is an intensive quantity

  1. Energy

  2. Weight

  3. Volume

  4. Length

  5. Temperature

Show answer
Correct Option: E
Explanation:

Temperature is an intensive property.

Which of the following gases will have the highest kinetic energy per mole at the same temperature and pressure?

  1. Hydrogen

  2. Oxygen

  3. Methane

  4. All the above gases will have the same KE.

  5. -

Show answer
Correct Option: D
Explanation:

At the same temperature and pressure, all the gases will have the same kinetic energy.

Which of the following gases has lower density than air?

  1. Neon

  2. Oxygen

  3. Chlorine

  4. Propane

  5. -

Show answer
Correct Option: A
Explanation:

Neon has lower density than air.

What happens if the volume and temperature of a gas are doubled?

  1. Pressure is doubled.

  2. Pressure is reduced to half.

  3. Pressure is slightly increased.

  4. Pressure remains the same.

  5. -

Show answer
Correct Option: D
Explanation:

It is true.

Which of the following statements is incorrect regarding kinetic molecular theory of gases?

  1. Molecules move randomly in all directions.

  2. Attractional force between gas molecules is negligible.

  3. In comparison to the total volume of gas, molecules have comparable values.

  4. Gases are composed of a large number of particles that behave like hard spherical objects in a state of constant random motion.

  5. -

Show answer
Correct Option: C
Explanation:

In comparison to the total volume of gas, molecules have negligible volumes.

What does Graham's law of diffusion state?

  1. It states that at constant temperature and pressure, the rate of diffusion of a gas is inversely proportional to the square root of its density.

  2. Equal volumes of all gases at the same temperature and pressure have the same number of molecules.

  3. At constant pressure, the volume of a given mass of gas is directly proportional to the absolute temperature.

  4. At constant temperature, the volume of a given mass of a gas is inversely proportional to pressure.

  5. -

Show answer
Correct Option: A
Explanation:

It is true about Graham's law.

One molecule of a monoatomic gas A reacts with two volumes of homo nuclear diatomic gas B to form a gaseous compound of the formula

  1. AB2

  2. AB4

  3. A4B

  4. A2B

  5. -

Show answer
Correct Option: B
Explanation:

The compound will be AB4.

The volume of an elementary gas A, on decomposition, gives 3 volumes of a diatomic gas B. The atomicity of gas A is

  1. 1

  2. 2

  3. 3

  4. 4

  5. -

Show answer
Correct Option: C
Explanation:

Atomicity is the total number of atoms present in one molecule of an element.

How can an equation of state be represented?

  1. M.V = wP.R.T

  2. MT/R = wV/P

  3. wR/P = VM/T

  4. None of these

  5. -

Show answer
Correct Option: C
Explanation:

This is the equation of state.

On what factor(s) does gas constant R depend?

  1. Nature of the gas

  2. Pressure, temperature and volume

  3. Amount of gas

  4. Temperature

  5. -

Show answer
Correct Option: B
Explanation:

The universal gas constant is common for all gases.

The critical temperature of water is higher than oxygen because a water molecule has

  1. lesser electrons than oxygen

  2. dipole moment

  3. V shape

  4. 2 covalent bonds

  5. -

Show answer
Correct Option: A
Explanation:

It has lesser electrons than oxygen.

Which of the following statements is correct?

  1. One gas is ideal in all the real gases present.

  2. Helium and hydrogen are ideal gases.

  3. Ideal gas is an imaginary gas.

  4. Ideal gas can be liquefied by lowering the temperature and increasing the pressure.

  5. -

Show answer
Correct Option: C
Explanation:

This statement is true.

The statement "one mole of gas at NTP occupies 22.4 litres'' may be derived from

  1. Gay Lussac's law

  2. Boyle's law

  3. Graham's law

  4. Avogadro's law

  5. -

Show answer
Correct Option: D
Explanation:

Avogadro's law states that equal volume of all gases at the same temperature and pressure has the same number of molecules.

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