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
What type of isomers are they?

1. Chain

2. Functional

3. Position

4. All of the above

Primary, secondary and tertiary nitroalkanes can be identifier by the action of:

1. ${\mathrm{HNO}}_2<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>\mathrm{NaOH}\left(aq\right)$

2. ${\mathrm{CHCl}}_3<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>\mathrm{NaOH}<mspace\; width="1em"></mspace>\left(aq\right)$

3. ${\mathrm{CHCl}}_3<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>\mathrm{KOH}(\mathrm{alc}.)$

4. none of these

A nitrogenous substance X is treated with HNO₂ and the product so formed is further treated with NaOH solution, which produces blue colouration. X can be:

1. ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{NH}}_2$

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{NO}}_2$

3. ${\left({\mathrm{CH}}_3\right)}_2\mathrm{C}(\mathrm{N}=\mathrm{O})\left({\mathrm{NO}}_2\right)$

4. ${(\mathrm{CH}}_{}$₃)2CHNO2

$\stackrel{{\left({\mathrm{NH}}_4\right)}_2\mathrm{S}}{\to }A\underset{0-5°C}{\overset{NaN{O}_2/HCl}{\to }}B\underset{∆}{\overset{C_2{H}_{5}OH}{\to }}\mathrm{C<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>}$

Product (C) is  

1. Nitrobenzene

2. 1,3-Diethoxybenzenez

3. Ethoxybenzene

4. Benzene

Which of the following is regenerated at the end of the reaction

(1) X

(2) Y

(3) Z

(4) W

Product (C) in the above reaction is:

1. 

2.

3. 

4.

 $({\mathrm{NH}}_4{)}_2{\mathrm{SO}}_4<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>\mathrm{KCNO}$ upon heating generates -

1. Nitrogen gas

2. Carbon dioxide

3. Biuret

4. Ammonium carbonate

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