Gases

Total Questions: 7

1 - Laughing gas is called---?

A ) Oxygen
B ) Nitrous oxide ✅
C ) Carbon dioxide
D ) Hydrogen

2 - Cooking gas is mixture of which of the following two gases?

A ) Butane and Propane ✅
B ) Oxygen and Nitrogen
C ) Methane and Carbon dioxide
D ) Oxygen and Methane

Explanation:

Cooking gas is a mixture of: Butane and Propane

  • Cooking gas is commonly known as LPG (Liquefied Petroleum Gas).
  • It mainly consists of two hydrocarbons:
    • Butane (C₄H₁₀)   Propane (C₃H₈)

🔹 Properties of LPG:

  • ✅Stored under pressure in liquid form
  • ✅Easily vaporizes to gas when released
  • ✅Highly flammable — used widely as cooking fuel.

4 - Which of the following gases is used in illuminating?

A ) Neon ✅
B ) Nitrogen
C ) Ammonia
D ) Methane

5 - Which gas can be accomulated in a poorly ventilated buildings?

A ) Radon ✅
B ) Neon
C ) Methane
D ) None of these

6 - Iron and steel structures are damaged by----:

A ) Carbon dioxide
B ) Carbon monoxide
C ) Sulphur dioxide ✅
D ) Methane

7 - Which gas is commonly used in refrigeration,?

A ) Freon ✅
B ) Nitrogen
C ) Oxygen
D ) Carbon dioxide