Which alkene is obtained as the major product in the given reaction?

Which of the following amines reacts most rapidly with $CH_3I$?

When aniline is nitrated with nitrating mixture in ice-cold condition, the major product obtained is

Nitration of which of the following reactants gives the maximum $\%$ of the meta product (using $HNO_3 / H_2SO_4$)?

The correct order of basic strength of Pyrrole,Pyridine,and Piperidine is:

The compound $X (C_{7}H_{9}N)$ reacts with benzene sulphonyl chloride to give $Y (C_{13}H_{13}NO_{2}S)$ which is insoluble in alkali. The compound $X$ is