Tautomerism will be exhibited by

The reagent that reacts with nitromethane to form  methylhydroxylamine is

In the reduction of nitrobenzene, which of the following is the intermediate?

Nitrobenzene on further excessive nitration gives

Attacking species in nitration of benzene in presence of fuming HNO₃ is

Reduction of nitrobenzene in the presence of Zn / NH₄Cl gives

Consider the following reaction
What is Y?

In the above sequence, Y can be

The major product (70% to 8%) of the reaction between m-dinitrobenzene with NH₄HS is