Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEETChemistryHaloalkanes and Haloarenes

Which of the following gives cyanide when reacted with KCN (A) Chloro benzene (B) Allyl bromide (C) Vinyl chloride (D) Benzyl bromide

Options

  1. AA, B and C are correct
  2. BA and B are correct
  3. CB and D are correct
  4. DA and C are correct

Correct answer

C. B and D are correct

Step-by-step solution

The reaction with KCN (potassium cyanide) involves an SN1 or SN2 nucleophilic substitution, where the cyanide ion (CN-) replaces a leaving group. (B) Allyl bromide (( CH 2= CH - CH 2 Br ) ) and (D) Benzyl bromide (( C 6 H 5- CH 2 Br ) ) both undergo SN1 or SN2 reactions with KCN to form the corresponding cyanides: - Allyl bromide ( ) Allyl cyanide ( ( CH 2= CH - CH 2 CN )) - Benzyl bromide ( ) Benzyl cyanide (C6H5-CH2CN) (A) Chlorobenzene (C6H5Cl) does not react with KCN because the Cl - is not a good leaving group

Practice Haloalkanes and Haloarenes on Quantrex Academy →

More from Haloalkanes and Haloarenes

Which of the following reactions can convert chlorobenzene into toluene? 2026Identify best method for preparation of Alkyl fluoride from following 2026Identify the chemical name of the commonly used refrigerant Freon 12 2026Which of the following alkyl halides gives a mixture of alkenes on dehydrohalogenation? 2026Which order of kinetics is followed by the reaction between tert-butyl bromide and hydroxide ion to give tert-Butyl alcohol? 2026Above reaction is known as 2026Which of the following product obtained when alkyl chloride react with aq KOH at room temperature? 2026Chlorobenzene reacts with Mg in dry ether to give a compound A, which further reacts with ethanol to give B. Identify B. 2026 Full Haloalkanes and Haloarenes list All NEET PYQs