Aniline reacts with concentrated​ HNO₃ to give

Consider the following reactions,


The compound $\left[\mathrm{P}\right]$ is:

Consider the reaction sequence from $\mathrm{P}$ to $\mathrm{Q}$ shown below. The overall yield of the major product $\mathrm{Q}$ from $\mathrm{P}$ is $75\%.$ What is the amount in grams of $\mathrm{Q}$ obtained from $9.3 \mathrm{mL}$ $\mathrm{P}$? (Use density of $\mathrm{P}$ $=1.00{\text{\hspace{0.33em}g\hspace{0.33em}mL}}^{-1};$ Molar mass of $\mathrm{C}=12.0,\mathrm{H}=1.0,\mathrm{O}=16.0$ and $\mathrm{N}=14.0 \mathrm{g} {\mathrm{mol}}^{-1}$)

The major products $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ in the following sequence of transformations

 are 

The nitrogen cycle is given below. Identify A and B in it.

Arrange the following compounds in increasing order of their base strength.

The correct order of basicity of the following amines 

I 

II 

III 

IV 

Study the following illustration of nitrogen cycle and identify $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ in it.