What products are formed during the electolysis of concentrated aqueous solution of sodium chloride?(I) Cl2(g) at anode (II) NaOH as electrolyte (III) H2(g) at cathode
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a
I only
b
l and II only
c
I and III only
d
I, II and III
answer is D.
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Detailed Solution
Anode : 2Cl−(aq)⟶Cl2(g)+2e− Cathode : 2H2O+2e−⟶H2(g)+2OH−(aq) Net reaction 2Na+(aq)+2Cl−(aq)+2H2O(l)⟶Cl2(g)+H2(g)+2OH−(aq)+2Na+(aq)