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How will you bring about the following conversion?
Chlorobenzene to benzoic acid
Answer
Answer
AIEquations: $\mathrm{C_{6}H_{5}Cl} + \mathrm{Mg} \xrightarrow{\text{dry}\text{ }\text{ether}} \mathrm{C_{6}H_{5}MgCl}$ $\mathrm{C_{6}H_{5}MgCl} + \mathrm{CO_{2}} \xrightarrow{\text{dry}\text{ }\text{ether}} \mathrm{C_{6}H_{5}COOMgCl}$ $\mathrm{C_{6}H_{5}COOMgCl} + \mathrm{H_{2}O} \xrightarrow{\mathrm{H_{3}O}^{+}} \mathrm{C_{6}H_{5}COOH} + \mathrm{Mg(OH)Cl}$
Chlorobenzene to benzoic acid: Grignard reagent, then carbon dioxide, then hydrolysis.
From ISC 2026 Improvement Chemistry Paper 1, question 8(i).