BITSAT 2013 Paper

Electrolysis of a concentrated aqueous solution of either sodium or potassium salts of saturated carboxylic acids yields higher alkane at anode.
RCOOK

Electrolytic

→

Ocidation

2RCO−

Anode

+

2K+

Cahode

At anode 2RCOO− → 2RCOO + 2e− → R - R + 2CO2
At Cathode 2K++2e− → 2K
2K + H2O → 2KOH+H2 ↑
(Kolbe's Method)