In Kolbe’s electrolysis reaction of the salt of 2,2-dimethyl propanoic acid it gives the following major product at anode

Explanation:

In Kolbe’s electrolysis reaction, when a salt of 2,2-dimethylpropanoic acid (a carboxylate) undergoes electrolysis, the carboxylate anion (R-COO⁻) is oxidized at the anode to form a radical, which then undergoes a dimerization reaction to form a major product.

• 2,2-Dimethylpropanoic acid has the structure (CH₃)₂C(CO₂⁻)CH₂, so the carboxylate ion is (CH₃)₂C(CO₂⁻)CH₂.
• At the anode, the carboxylate anion undergoes oxidation, forming a radical that undergoes dimerization, leading to the formation of isobutene and isobutane (due to the coupling of two C₄ fragments).

Thus, Isobutene & isobutane are the major products formed at the anode in this electrolysis reaction.

Final Answer

The correct answer is: Isobutene & isobutane.