Most Important Gases Quiz Test Online

1)

Which of the following gases has the lowest root mean square (r.m.s) velocity at 25°C?

2)

The average kinetic energy of gas molecules is:

3)

In a closed flask of one dm³, 2.0 g of hydrogen gas is heated from 27°C to 327°C. Which of the following is incorrect?

4)

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

5)

Under what conditions of temperature and pressure will a real gas behave most like an ideal gas?

6)

The Van der Waal’s constant (a) is maximum for which gas?

7)

The highest temperature at which a substance can exist as a liquid is called its:

8)

An ideal gas cannot be liquefied because:

9)

The critical temperature of different gases depends upon:

10)

The compressibility factor (Z), which measures the deviation of a real gas from ideal behavior, is given by (for one mole):

11)

In Van der Waal's equation for real gases, the term "a" represents the coefficient of attraction. What is its unit?

12)

The compressibility factor (Z) for an ideal gas is:

13)

The pressure of a gas is due to:

14)

The numerical value of the general gas constant (R) in dm³ atm K⁻¹ mol⁻¹ is:

15)

Very small values of Van der Waal’s constant (a) for a particular gas indicate:

16)

The product of PV of a gas has the unit of:

17)

Under high pressure, which of the following gases shows more ideality in character?

18)

The absolute temperature of a gas is directly proportional to its average:

19)

When 200 cm³ of a gas at constant pressure is heated, its volume:

20)

The excluded volume in Van der Waal’s equation is how many times the actual volume of gas molecules?

1)

A gas is enclosed in a 20 cm³ container with a moving piston. According to the kinetic theory of gases, what happens to the freely moving molecules if the temperature increases from 20°C to 100°C? (MDCAT 2018)

2)

Identify the value of the gas constant (R) in atm dm³ mol⁻¹ K⁻¹: (MDCAT 2017)

3)

In the Van der Waal’s equation, What does the term "b" represent? (MDCAT 2017)

4)

At absolute zero, the molecules of hydrogen gas will have: (MDCAT 2019)

5)

Which one of the following expressions represents Avogadro’s Law? (MDCAT 2010)

6)

The actual volume of gas molecules is considered negligible at which of the following pressures? (NMDCAT 2020 / ETEA 2016)

7)

In gases, all collisions between particles are elastic. What does "Elastic Collisions" mean? (MDCAT 2013)

8)

According to the general gas equation, the density of an ideal gas depends on: (NMDCAT 2020)

9)

Four gases (H₂, He, N₂, and CO₂) are at 0°C. Which gas shows greater non-ideal behavior? (MDCAT 2013)

10)

Which of the following statements is applicable to both ideal and real gas molecules? (SET 2019)

11)

Which of the following is the correct equation to calculate relative molecular mass of a gas? (MDCAT 2018)

12)

The root mean square (r.m.s) velocity of gas molecules is inversely proportional to the square root of its: (MDCAT 2010)

13)

The number of molecules in 22.4 dm³ of H₂ gas at 0°C and 1 atm is: (MDCAT 2012)