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Air contains maximum amount of

  • oxygen
  • nitrogen
  • hydrogen
  • carbon dioxide

Answer: Option B

Similar Questions :

1. What is laughing gas ?

  • nitrous oxide
  • nitric oxide
  • nitrogen oxide
  • nitrogen peroxide

Answer: Option A

2. Faraday's Law is associated with

  • Reaction of gases
  • Pressure of gases
  • Electrolysis
  • Temperature and pressure

Answer: Option C

3. The cyclotron is used to

  • accelerating particles
  • separating elements
  • purifying metals
  • making alloys

Answer: Option A

4. What nucleus of atom contains ?

  • protons
  • electrons
  • electrons and protons
  • protons and neutrons

Answer: Option D

5. Mass number of a nucleus is :

  • the sum of the number of protons and neutrons present in the nucleus
  • always more than the atomic weight
  • always less than its atomic number
  • None of above

Answer: Option A

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