Amongst the compounds given, the one that would form a brillient coloured dye on treatment with NaNO₂ in dil. HCl followed by addition to an alkaline solution of b-napthol is:

1. 

2. 

3. 

4. 

The presence of ${\mathrm{NH}}_4^{+}$ radical in solution can be detected by:

1. Fehling’s solution

2. Benedict’s solution

3. Schiff's reagent

4. Nessler’s reagent

Potassium thiocyanate solution reacts with ferric chloride to give:

(1) pink colour

(2) deep blue colour

(3) green colour

(4) blood-red colour

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

Choose the appropriate sequence to maximize the yield of 3-chloro-aniline from benzene.
 

1. Chlorination, nitration, reduction

2. Nitration, chlorination, reduction

3. Nitration, reduction, chlorination

4. Nitration, reduction, acylation, chlorination, hydrolysis

A reaction that can convert acetamide to methanamine is:

1. Carbylamine reaction

2. Hoffmann bromamide reaction

3. Stephens reaction

4. Gabriels phthalimide synthesis

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

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

The correct statement regarding the basicity of arylamines is

(1) Arylamines are generally more basic than alkylamines because the nitrogen lone-pair electrons are not delocalized by interaction with the aromatic ring p-electron system.

(2) Arylamines are generally more basic than alkylamines because of aryl group.

(3) Arylamines are generally more basic than alkylamines, because the nitrogen atom in arylamines is sp-hybridized

(4) Arylamines are generally less basic than alkylamines because the nitrogen lone-pair electrons are delocalized by interaction with the aromatic ring p-electron system.

The electrolytic reduction of nitrobenzene in a strongly acidic medium produces

1. p-Aminophenol

2. Azoxybenzene

3. Azobenzene

4. Aniline