Action of $HNO_2$ on $CH_3NH_2$ gives the following as the major product:

Urea on slow heating gives:

Which of the following substances generally has the highest melting point?

Explain the nitration and sulphonation of aniline.

The reaction of amides with $Br_2$ and $OH^-$ (Hofmann bromamide degradation) involves an intramolecular migration of the alkyl group from the carbonyl carbon to the nitrogen atom with retention of configuration at the migrating center. Predict the products for the following reaction:
(Image shows two substituted cyclohexanecarboxamides reacting with $Br_2/OH^-$)

The final major product of the following reaction is: