The diazonium salt  gives,  with:

1. HCl/CuCl

2. HNO₂/Cu

3. C₂H₅OH

4.  SnCl₂/HCl

The reaction, ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{N}}_2\mathrm{Cl} \stackrel{{\mathrm{Cu}}_2{\mathrm{Cl}}_2/\mathrm{HCl}}{\to }{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{Cl} + {\mathrm{N}}_2$ is called:

1. Etard's reaction

2. Sandmeyer's reaction

3. Wurtz-Fitting reaction

4. Perkin's reaction

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

In the chemical reactions,

the compounds 'A' and 'B', respectively, are:

1. Nitrobenzene and chlorobenzene

2. Nitrobenzene and fluorobenzene

3. Phenol and benzene

4. Benzene diazonium chloride and fluorobenzene

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