An important insecticide is obtained by the action of chloral on chlorobenzene. It is

Which one of the following is least reactive in a nucleophilic substitution reaction?

Which of the following does not give Friedel-Crafts reaction?

Which is the best synthesis of $1-$methoxy$-2,4-$dinitrobenzene?

The products formed in the following reaction sequence are:

Two benzyne intermediates are likely to be formed equally. Reaction with amide ion can occur in two different directions with each benzyne,giving three possible products. They are formed in a $1 : 2 : 1$ ratio. Asterisk $(*)$ refers to $^{14}C$. Product $(A)$ is: