Which one of the following compounds does not react with acetyl chloride?

Reduction of nitrobenzene with $Zn$ and alcoholic $KOH$ solution results in the formation of the following compound:

Complete the following reaction: $R-NH_2 + H_2SO_4 \to$

Which of the following chemicals are used to manufacture methyl isocyanate that caused the $Bhopal$ $Tragedy$?
$(i)$ $Methylamine$
$(ii)$ $Phosgene$
$(iii)$ $Phosphine$
$(iv)$ $Dimethylamine$

Assertion : Alkyl isocyanides in acidified water give alkyl formamides.
Reason : In isocyanides,carbon first acts as a nucleophile and then as an electrophile.

Which one of the following compounds undergoes bromination of its aromatic ring (electrophilic aromatic substitution) at the fastest rate?