Question

Which among the following gases is easily liquefied?

विकल्प

• Oxygen

• Ammonia

• Hydrogen

• Helium

Answer 1

Ammonia

Explanation:

When the temperature of a gas falls below the critical point, it can be liquefied by cooling or compressing it. Gases with high critical temperatures, such as CH and NH₃, can be liquefied simply by applying a sufficient amount of pressure.