Statement I is wrong, but Statement II is right. Statement I should say: In Kolbe's electrolysis of sodium propionate, the product is butane, not n-hexane. The chemical reaction is: ‌2CH3CH2COONa+2H2O→ ‌CH3CH2CH2CH3+2CO2+2NaOH+H2↑ Butane In Statement II, it is correct that in Kolbe's process, carbon dioxide ( CO2 ) is released at the anode and hydrogen gas (H2) is released at the cathode.