Class IX

Process in which substance gains electrons is called
  1. oxidation
  2. hydrogenation
  3. sublimation
  4. reduction
In a dry cell anode is made up of
  1. zinc
  2. calcium
  3. sodium
  4. graphite
On industrial scale sodium metal is prepared by electrolysis of fused
  1. NaOH
  2. NaCl
  3. NaO
  4. NH3
Loss of hydrogen atoms by an element is called
  1. hydrogenation
  2. oxidation
  3. reduction
  4. sublimation
Electrolyte used for tin plating is
  1. sulphide ore
  2. stannous sulphate
  3. hydrogen sulphate
  4. sodium chloride
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