Which of the following compounds is most basic?

1.		2.
3.		4.

An organic compound 'A' on treatment with NH₃ gives 'B', which on heating gives 'C'. 'C',
when treated with Br₂ in the presence of KOH produces ethylamine. Compound 'A' is:

1.	CH3CH2COOH
2.	CH3COOH
3.	CH3CH2CH2COOH
4.

An organic compound ($C_3{H}_{9}N$) (A), when treated with nitrous acid, gave an alcohol, and N₂ gas was evolved. (A) on warming with CHCl₃ and caustic potash gave (C) which on reduction gave isopropylmethylamine. The structure of (A) is:

1.		2.
3.		4.

D is N-methyl aniline in the given below sequence of reaction:
\(\text A\xrightarrow{\bf\text{ reduction }}\text B\xrightarrow{\bf\text {CHCl}_3\text{/KOH}}\text C\xrightarrow{\bf\text{ reduction }}\text D\)

Structure of A can be:

1.		2.
3.	\(\mathrm{CH_3NH_2 }\)	4.

The products formed when aniline reacts with Br₂ water and NaNO₂/HCl are, respectively:

Electrolytic reduction of nitrobenzene in weakly acidic medium gives:

1. Aniline

2. p-Hydroxy aniline

3. N-Phenyl hydroxyl amine

4. Nitroso benzene

Aniline in a set of reactions yielded a product D

The structure of the product D would be:

1. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2\mathrm{OH}$

2. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2{\mathrm{NH}}_2$

3. ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{NHOH}$

4. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NHCH}}_2{\mathrm{CH}}_3$

Aniline when diazotized in cold and then treated with dimethyl aniline gives a coloured product. Its structure would be:

1.
2.
3.
4.

Which chemical reaction leads to the formation of isocyanide?

1. Reimer Tiemann reaction.
2. Carbylamine reaction.
3. Hoffmann bromamide reaction.
4. None of the above.

The final product C, obtained in this reaction, would be:

1.		2.
3.		4.