Question

Give chemical tests to distinguish between the following pairs of compounds:
Bromobenzene and benzyl bromide
Chloroform and carbon tetrachloride

Answer 1

Bromobenzene / benzylbromide.

If I add KOH to both of the compounds substitution takes place in case of benzyl bromide and then I oxidize with ${KMnO}_4$. I will get benzene carboxylic acid. Which gives effervescence with ${NaHCO}_3$.

chloroform / ${CCl}_4$

chloroform on warming with alcohol and KOH and aniline gives carbylamine. The distinguishing feature is its foul smell. while performed on ${CCl}_4$ no effect will be shown.