Choose the correct statement from the ones given below for two anilium in:

                   

1. II is not an acceptable canonical structure because carbonium ions are less stable than ammonium ions

2. II is not an acceptable canonical structure because it is non-aromatic

3. II is not an acceptable canonical structure because the nitrogen has 10 valence electrons

4. II is an acceptable canonical structure

When nitrobenzene is treated with Br₂ in presence of FeBr₃, the major product formed is m-bromonitrobenzene. Statements which are related to obtain the m-isomer are:

(1) the relative electron density on meta carbon is more than that of ortho and para positions

(2) loss of aromaticity when Br⁺ attacks at the ortho and para positions and not at meta position

(3) easier loss of H⁺ to regain aromaticity from the meta positions than from ortho and para positions

(4) none of the above

Potassium thiocyanate solution reacts with ferric chloride to give:

(1) pink colour

(2) deep blue colour

(3) green colour

(4) blood-red colour

Which one of the following nitro-compounds does not react with nitrous acid?

Method by which aniline cannot be prepared is

1. hydrolysis phenyl isocyanide with an acidic solution

2. degradation of benzamide with bromine in alkaline solution

3. reduction of nitrobenzene with H₂/Pd in ethanol

4. potassium salt of phthalimide treated with chlorobenzene followed by the hydrolysis

with aqueous NaOH solution

The following reaction, 

is known by the name:

1. Friedel-Crafts reaction

2. Perkins reaction

3. Acetylation reaction

4. Schotten-Baumann reaction

In a reaction of aniline a coloured product C was obtained.

The structure of C would be

(a) 

(b) 

(c) 

(d) 

Which of the following is more basic than aniline?

1. Diphenylamine

2. Triphenylamine

3. p-Nitroaniline

4. Benzylamine

The product formed by the reaction of C₆H₅CN and CH₂N₂ is:

1. 

2. 

3. 

4. None of these

Biuret test is not given by: 

(1) proteins

(2) carbohydrates

(3) polypeptides

(4) urea