Question Detail

Air contains maximum amount of

  • oxygen
  • nitrogen
  • hydrogen
  • carbon dioxide
Similar Questions :

1. Which have maximum number of isotopes ?

  • Bromine
  • Aluminium
  • Polonium
  • Carbon

2. The high reactivity of fluorine is due to ?

  • small size of fluorine atom
  • its high electro negativity
  • availability of d-orbitals
  • strong F - F bond

3. The material which can be deformed permanently by heat and pressure is called a

  • thermoset
  • thermoplastic
  • chemical compound
  • polymer

4. 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

5. pH of water is

  • 5
  • 6
  • 7
  • 8
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