JEE Main 2022 · 25 Jul · Shift 2 · Chemistry Q76

ChemistrySingle correct+4 / -1Question 76 of 90

$\mathrm{CH_3{-}CH_2{-}CN\xrightarrow[Ether]{CH_3MgBr}A\xrightarrow{H_3O^+}B\xrightarrow[HCl]{Zn{-}Hg}C}$

The correct structure of C is

\mathrm{CH_3{-}CH_2{-}CH_2{-}CH_3}

\mathrm{CH_3{-}CH_2{-}CO{-}CH_3}

\mathrm{CH_3{-}CH_2{-}CH(OH){-}CH_3}

\mathrm{CH_3{-}CH_2{-}CH{=}CH_2}

Answer and worked solution

Official answer: A

Steps. Grignard on the nitrile gives butan-2-one after hydrolysis; Clemmensen reduction gives butane.

(A)

Topics:Oxidation and reduction Cyanides and isocyanides

JEE Main 2022 · 25 Jul · Shift 2, Chemistry question 76