An organic compound (A) on reduction gives compound (B) which on reaction with chloroform and potassium hydroxide forms (C). The compound (C) on catalytic reduction gives N-methyl aniline. What is the structure of compound (A)?

1. Nitrobenzene
2. Nitromethane
3. Methylamine
4. Aniline

   and are ........... isomers.
   \(\mathrm {R~~~N~~~~O}\)

1.Chain

2. functional

3. position

4. all of these

Product (C) in the above reaction is:

1. 

2.

3. 

4.

An organic compound X (mol. formula C₆H₅O₂N) has 6 carbon atoms in a ring system, three double bonds and also a nitro group as substituent X is:

1. Homocyclic but not aromatic

2. Aromatic but not homocyclic

3. Homocyclic and aromatic

4. Heterocyclic

A given nitrogen-containing aromatic compound a reacts with Sn/HCl, followed by HNO₂ to give an unsatable compound B.B, on treament with phenol, forms a beautiful coloured compound C with the molecular formula C₁₂H₁₀N₂O. The structure of compound A is