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Chemistry · PYQ NEET UG 2016(2)
हिन्दीConsider the reaction: \( \mathrm{CH}_3\mathrm{CH}_2\mathrm{CH}_2\mathrm{Br} + \mathrm{NaCN} \longrightarrow \mathrm{CH}_3\mathrm{CH}_2\mathrm{CH}_2\mathrm{CN} + \mathrm{NaBr} \) This reaction will be the fastest in ______.
Correct answer · Option 4
N,N'-dimethylformamide (DMF)
Explanation
The reaction is an \( \mathrm{S_N}2 \) substitution reaction which proceeds fastest in polar aprotic solvents such as DMF because they do not solvate the nucleophile strongly.
