Question

The acid formed when propyl magnesium bromide is treated with CO₂ followed by acid hydrolysis is ______.

Options

• C₃H₇COOH

• C₂H₅COOH

• CH₃COOH

• C₃H₇OH

Answer 1

The acid formed when propyl magnesium bromide is treated with CO₂ followed by acid hydrolysis is `bbunderline(C_3H_7COOH)`.

Explanation:

The acid formed when propyl magnesium bromide (C₃H₇MgBr) reacts with CO₂ and then undergoes acid hydrolysis is propanoic acid (C₃H₇COOH), also known as propionic acid, because the propyl group adds to the carbon of CO₂, resulting in a carboxylic acid with one more carbon.

Butanoic acid is formed as per the reaction:

\[\ce{CH3CH2CH2MgBr + CO2 -> CH3 - CH3 - CH2 - COOH- \overset{+}{M}{g}Br ->[H2O/H+][]CH3CH2CH2COOH + Mg(OH)Br}\]