Ideal Gas Equation Questions

In thermodynamics, Ideal gas law is a well-defined approximation of the behavior of many gases under diverse conditions. The state of an ideal gas is determined by the macroscopic and microscopic parameters like pressure, volume, temperature.

The ideal gas equation is given as follows:

PV = nRT

Where P is the pressure of the ideal gas, V is the volume of the ideal gas, n is the amount of ideal gas measured in terms of moles, R is the gas constant and T is the temperature.

Read More: Ideal Gas Law

Important Ideal Gas Equation Questions with Answers

1. One mole of an ideal gas at STP occupies how many litres?

1. 20.4 litres
2. 21.4 litres
3. 22.4 litres
4. 23.4 litres

Answer: c) 22.4 litres.

Explanation: At standard temperature and pressure, one mole of an ideal gas occupies 22.4 litres.

2. Boyle’s law is given by _____

1. \(\begin{array}{l}V\propto \frac{1}{T}\end{array} \)
2. \(\begin{array}{l}V\propto \frac{1}{P}\end{array} \)
3. \(\begin{array}{l}V\propto {P}\end{array} \)
4. \(\begin{array}{l}V\propto \frac{1}{2T}\end{array} \)

Answer: b)

Explanation: According to Boyle’s law, pressure is inversely proportional to volume.

3. Which of the following is the ideal gas equation?

1. P+V=nRT
2. PV=n+R+T
3. PV=2nRT
4. PV=nRT

Answer: d) PV=nRT

Explanation: The ideal gas equation is given by the formula PV=nRT.

4. Temperature is measured in the unit of _____.

1. Radians
2. Kelvin
3. Luminosity
4. Volt

Answer: b) Kelvin

5. Which law describes how molecules influence gas characteristics such as temperature and pressure.

1. Faraday’s laws of electromagnetism
2. Newton’s laws of motion
3. Kepler’s law
4. Kinetic theory of gases

Answer: d) Kinetic theory of gases.

Explanation: The kinetic theory of gases is used to explain the behaviour of gases.

6. Choose the YES or NO: Can the ideal gas equation be applied to liquids?

1. YES
2. NO

Answer: b) NO

Explanation: Ideal gas equation cannot be applied to liquids.

7. As per the kinetic theory of gases, when molecules collide with each other ______

1. no energy is gained
2. no energy is lost
3. no energy is gained or lost
4. none of the above options

Answer: c) no energy is gained or lost.

Explanation: When molecules collide with each other, no energy is gained or lost as per the kinetic theory of gas.

8. Choose the correct answer: When volume in the units of m^{3}, the pressure P in the units of pascals Pa, and the temperature T in the units of kelvin K, the value of R = _____

1. R = 0.082 L.atm/K.mol
2. R = 8.31 J/K.mol

Answer: b) R = 8.31 J/K.mol

9. According to which law V ∝ T?

1. Boyle’s law
2. Charles’s law
3. Avogadro’s law
4. Maxwell’s law

Answer: b) Charles’s law

Explanation: According to the Charles’s law V ∝ T.

10. ‘k’ gives _____

1. Maxwell’s constant
2. Boltzmann constant
3. Faraday’s constant
4. Avagadro’s constant

Answer: b) Boltzmann constant

Explanation: Boltzmann constant is represented by ‘k’, and its value is 1.38066 x 10^-23 J/K.

Practice Questions

1. State ideal gas law.
2. Give the ideal law equation.
3. Define Avogadro’s number.
4. Who developed the kinetic theory of gases?
5. State Charles’s law.

Watch the video below to know about kinetic theory of gases.

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