Question -
Answer -
In the electrolysis of moltenNaCl, Cl2 isobtained at the anode as a by product.
If an aqueous solution of NaCl iselectrolyzed, Cl2 willbe obtained at the anode but at the cathode, H2 will be obtained (instead of Na). This is becausethe standard reduction potential of Na (E°= − 2.71 V) is more negative thanthat of H2O (E° = −0.83 V). Hence, H2Owill get preference to get reduced at the cathode and as a result, H2 is evolved.
