In nitration of benzene using a mixture of conc. H₂SO₄ and conc. HNO₃, the species that initiates the reaction is :

1. NO₂
2. NO⁺
3. NO₂⁺
4. NO₂^-

Reduction of aromatic nitro compounds using Fe and HCl gives:

1.  Aromatic oxime

2.  Aromatic hydrocarbon

3.  Aniline

4.  Aromatic amide

The most reactive amine towards dilute hydrochloric acid is:

1.		2.
3.		4.

Acid anhydrides on reaction with primary amines give:

1.  Amide

2.  Imide

3.  Secondary amine

4.  Imine

The following reaction is named as:

\(\mathrm{Ar} \mathrm{N}_2^{+} \mathrm{Cl}^{-} \xrightarrow{\mathrm{Cu}/ \mathrm{HCl}} \mathrm{ArCl}+\mathrm{N}_2+\mathrm{CuCl}\)
1. Sandmeyer reaction
2. Gattermann reaction
3. Claisen reaction
4. Carbylamine reaction

Which of the following compound will not undergo azo coupling reaction with benzene diazonium chloride?

1.  Aniline

2.  Phenol

3.  Anisole

4.  Nitrobenzene

A compound among the following that does not undergo an azo coupling reaction with benzene diazonium chloride is:

1. Aniline

2. Phenol

3. Anisole

4. Nitrobenzene

Which of the following compounds is the weakest Bronsted base?

1.		2.
3.		4.

Among the following amines, the strongest Bronsted base is:

1.		2.
3.		4.

The correct decreasing order of basic strength of the following species is.

${\mathrm{H}}_2\mathrm{O},{\mathrm{NH}}_3,{\mathrm{OH}}^{-},{\mathrm{NH}}_2^{}$

$1.<mspace\; width="1em"></mspace>{\mathrm{NH}}_2^{-}>{\mathrm{OH}}^{-}>{\mathrm{NH}}_3>{\mathrm{H}}_2\mathrm{O}$
$2.<mspace\; width="1em"></mspace>{\mathrm{OH}}^{-}>{\mathrm{NH}}_2^{-}>{\mathrm{H}}_2\mathrm{O}>{\mathrm{NH}}_3$
$3.<mspace\; width="1em"></mspace>{\mathrm{NH}}_3>{\mathrm{H}}_2\mathrm{O}>{\mathrm{NH}}_2^{-}>{\mathrm{OH}}^{-}$
$4.<mspace\; width="1em"></mspace>{\mathrm{H}}_2\mathrm{O}>{\mathrm{NH}}_3>{\mathrm{OH}}^{-}>{\mathrm{NH}}_2^{-}$