CBSE  /  Class 11  /  Chemistry  /  Hydrogen

  • 1. 
    Pure HO is :

  • Semi – solid
  • Liquid
  • Solid
  • Gas

  • 2. 
    The freezing point of heavy water is

  • 0°C
  • 3. 8°C
  • 4°C
  • 1°C

  • 3. 
    HO used in rocket has the concentration:

  • 50%
  • 90%
  • 70%
  • 30%

  • 4. 
    Which of the following hydrides are generally nonstochiometric in nature?

  • Ionic Hydrides
  • Molecular Hydrides
  • Interstitial Hydrides
  • All of the Above.

  • 5. 
    What is the product of the reaction of HO with Cl?

  • O+ HOCl
  • HCl + O
  • HO + HCl
  • HCl + H

  • 6. 
    Water shows anomalous behavior between

  • 0 to 4°C
  • 0 to 5°C
  • 0 to -4°C
  • 4 to 0°C

  • 7. 
    Which of the following statements regarding hydrogen peroxide is/ are incorrect?

  • As aerating agent in production of sponge rubber
  • As an antichlor
  • For restoring white colour of blackened lead painting
  • All of the above

  • 8. 
    Atomic hydrogen is called

  • Protium
  • Deutrium
  • Nascent Hydrogen
  • Tritium

  • 9. 
    The volume strength of 1. 5 NHO

  • 4. 8
  • 5. 2
  • 8. 8
  • 8. 4

  • 10. 
    Water gas is mixture of hydrogen H and

  • CO
  • CO
  • Cl
  • SO
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