Class IX

On industrial scale sodium metal is prepared by electrolysis of fused
  1. NaOH
  2. NaCl
  3. NaO
  4. NH3
In a dry cell anode is made up of
  1. zinc
  2. calcium
  3. sodium
  4. graphite
Elements whose oxidation number is increased are
  1. reduced
  2. hydrogenated
  3. oxidized
  4. none of above
An electrolytic cell uses electrical energy to drive
  1. chemical reaction
  2. physical reaction
  3. no reaction
  4. none of above
Loss of hydrogen atoms by an element is called
  1. hydrogenation
  2. oxidation
  3. reduction
  4. sublimation
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