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Air contains maximum amount of

  • oxygen
  • nitrogen
  • hydrogen
  • carbon dioxide

Answer: Option B

Similar Questions :

1. Oxides of metals are alkaline.

  • TRUE
  • FALSE

Answer: Option A

2. Rare gases are

  • mono atomic
  • di atomic
  • tri atomic
  • None of above

Answer: Option A

Explanation:

Rare gases are mono atomic.

3. What is hottest part of the gas flame is called ?

  • blue zone
  • luminous zone
  • dark zone
  • non-luminous zone

Answer: Option D

4. Brass is an alloy of ?

  • Copper and Tin
  • Copper and Zinc
  • Copper and Aluminium
  • Iron and Copper

Answer: Option B

5. The nuclear particles which are assumed to hold the nucleons together are ?

  • positrons
  • neutrons
  • electrons
  • mesons

Answer: Option D

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