DPP 7.1

A carboxylic acid $\mathrm{A}\left({\mathrm{C}}_5{\mathrm{H}}_{10}{\mathrm{O}}_2\right)$ when heated with hydrazoic acid in the presence of concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4$ gives a compound $\mathrm{B}$ which on treatment with alkaline chloroform forms another compound $\mathrm{C}$. Compound $\mathrm{C}$ gives the following reactions.

(i) On hydrolysis in presence of acid, it gives compound $\mathrm{B}$ and methanoic acid.

(ii) On reduction it gives tert-butylmetyl amine.

Identify compound $\mathrm{A}$ and give all reactions.

The major product of the following reaction is:

Only one of the following amines will lose its nitrogen atom as trimethyl amine by repeated Hofmann elimination reactions:

The Hinsberg test of a ${\mathrm{C}}_5{\mathrm{H}}_{14}{\mathrm{N}}_2$ compound produces a solid that is insoluble in $10\%$ aq. $\mathrm{NaOH}.$ This solid derivative dissolves in $10\%$ aq. ${\mathrm{H}}_2{\mathrm{SO}}_4.$

 Which of the following would best fit these facts?

The final product $\left(\mathrm{B}\right)$ is:

Guanidine, ${\left({\mathrm{NH}}_2\right)}_2\mathrm{C}=\mathrm{NH},$ is said to be the strongest nitrogen containing organic base because:

Which is/ are correct reaction(s)?

Which of the following reactions represent major products?