A compound having molecular formula $$\mathrm{C}_4 \mathrm{H}_{11} \mathrm{N}$$, reacts with $$\mathrm{CHCl}_3$$ in alcoholic $$\mathrm{KOH}$$, on heating, to form a compound with a foul smell. Identify the optically active isomer of the compound which also shows the above reaction.

One of the reactions A, B, C, D given below yields a product which will not answer Hinsberg's test when reacted with Benzene sulphonyl chloride. Identify the reaction.

An organic compound with molecular formula $$\mathrm{C}_3 \mathrm{H}_5 \mathrm{N}$$ on hydrolysis gives compound '$$\mathrm{X}$$' which on treatment with $$\mathrm{Cl}_2 / \mathrm{P}$$ gives compound '$$\mathrm{Y}$$'. Compound '$$\mathrm{Y}$$' on reaction with $$\mathrm{NH}_3$$ gives '$$\mathrm{Z}$$'. The compound '$$\mathrm{Z}$$' is :

Arrange the following amines in the decreasing order of their solubilities in water.