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In the electrolysis of aqueous sodium chloride solution,following reactions may take place at cathode(reduction):
 
Select the correct option(s). 
  • a)
    Reduction of H2O(l) takes place more rapidly than that of water
  • b)
    If liquid mercury is used as cathode, Na+ ion is reduced in preference of  H2O,Na being soluble in Hg by forming amalgam
  • c)
    Both (a) and (b)
  • d)
    None of the above
Correct answer is option 'C'. Can you explain this answer?
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In the electrolysis of aqueous sodium chloride solution,following reac...


If amalgam is formed, I is preferred thus (a), (b) both are correct.
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In the electrolysis of aqueous sodium chloride solution,following reactions may take place at cathode(reduction):Select the correct option(s).a)Reduction of H2O(l)takes place more rapidly than that of waterb)If liquid mercury is used as cathode, Na+ion is reduced in preferenceof H2O,Na being soluble in Hg by forming amalgamc)Both (a) and (b)d)None of the aboveCorrect answer is option 'C'. Can you explain this answer?
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