MolSynapsequestion bank

MolSynapse / Question bank / Haloalkanes and Haloarenes / Preparation of alkyl and aryl halides

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3hx127

Which of the following reactions give the stated aryl halide as the principal product?

APhenol with $HCl$ and $ZnCl X_{2}$ gives chlorobenzene
B $C X_{6} H X_{5} N X_{2} X^{+} Cl X^{-} + CuBr / HBr C X_{6} H X_{5} Br$
CBenzene with $Cl X_{2}$ in bright sunlight gives chlorobenzene
D $C X_{6} H X_{5} N X_{2} X^{+} Cl X^{-} + KI C X_{6} H X_{5} I$

Answer: B, D

Sandmeyer bromination and iodide displacement of a diazonium salt (no copper needed for iodine) both give aryl halides. Sunlight with

Cl X_{2}

adds to benzene to give

C X_{6} H X_{6} Cl X_{6}

(BHC). In phenol the

C - O

bond has partial double-bond character through resonance, so

HCl / ZnCl X_{2}

cannot replace

OH

.

Practice Haloalkanes and Haloarenes More on Preparation of alkyl and aryl halides

Previous questionNext question

More questions on Preparation of alkyl and aryl halides