JEE Main 2022 · 30 Jul · Shift 2 · Chemistry Q45

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ChemistrySingle correct+4 / -1Question 45 of 90

Bromobenzene is converted to benzoic acid, as shown.

For the above conversion, the correct sequential addition of reagents is-

(i) Mg (ii) CO

_2

, dry ether (iii) H

_2

(i) NaOH (ii) C

_2

_5

OH (iii) HCl

(i) NaCN (ii) H

_2

O (iii) HCl

(i) KMnO

_4

(ii) HCl

Answer and worked solution

Official answer: A

Grignard route. PhBr + Mg → PhMgBr; with CO₂ in dry ether → PhCOOMgBr; hydrolysis gives benzoic acid. Aryl halides do not undergo simple SN with NaOH or NaCN.

(A)

Topics:Carboxylic acids Haloarenes

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JEE Main 2022 · 30 Jul · Shift 2, Chemistry question 45