JEE Main 2022 · 26 Jun · Shift 1 · Chemistry Q74

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ChemistrySingle correct+4 / -1Question 74 of 90

$\mathrm{(C_7H_5O_2)_2\xrightarrow{h\nu}[X]\rightarrow2\dot C_6H_5+2CO_2}$
Consider the above reaction and identify the intermediate 'X'

\mathrm{C_6H_5\text{-}\overset{+}{C}{=}O}

(benzoyl cation)

\mathrm{C_6H_5\text{-}CO\text{-}O^-}

(benzoate anion)

\mathrm{C_6H_5\text{-}CO\text{-}\ddot{\underset{\cdot\cdot}{O}}}

(oxygen drawn with two lone pairs, no charge or unpaired electron)

\mathrm{C_6H_5\text{-}CO\text{-}O^\bullet}

(benzoyloxy radical)

Answer and worked solution

Official answer: D

Benzoyl peroxide splits at the weak O-O bond, giving two benzoyloxy radicals, $\mathrm{C_6H_5COO^\bullet}$ (X). Each loses $\mathrm{CO_2}$ to give a phenyl radical.

(D)

Topics:Reactive intermediates

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JEE Main 2022 · 26 Jun · Shift 1, Chemistry question 74