MolSynapsequestion bank

MolSynapse / Question bank / Aldehydes, Ketones and Carboxylic Acids / Carboxylic acids: acidity, preparation, derivatives, HVZ reaction

JEE Advanced levelSingle correct optionDifficulty 3 of 3co208

Equimolar amounts of sodium ethanoate and sodium propanoate in concentrated aqueous solution are electrolysed (Kolbe). How many different hydrocarbons are formed by coupling at the anode?

A3
B2
C6
D4

Answer: A

The radicals

CH X_{3} \cdot

and

CH X_{3} CH X_{2} \cdot

can couple in three ways:

CH X_{3} - CH X_{3}

(ethane),

CH X_{3} - CH X_{2} CH X_{3}

(propane) and

CH X_{3} CH X_{2} - CH X_{2} CH X_{3}

(butane). So three hydrocarbons form.

Practice Aldehydes, Ketones and Carboxylic Acids More on Carboxylic acids: acidity, preparation, derivatives, HVZ reaction

Previous questionNext question

More questions on Carboxylic acids: acidity, preparation, derivatives, HVZ reaction