Amines

Which of the following reactions is used to distinguish primary aliphatic amines from primary aromatic amines?

1. Bromine water test
2. Reaction with nitrous acid
3. Tollens' test
4. Fehling's test

Why is aniline less basic than ethylamine?

1. The amino group is absent.
2. The lone pair on nitrogen is involved in resonance with the benzene ring.
3. Nitrogen has no lone pair.
4. Ethylamine contains oxygen.

Which statement regarding Gabriel phthalimide synthesis is correct?

1. It prepares tertiary amines.
2. It is suitable for preparing aromatic amines.
3. It gives only primary alkyl amines.
4. It converts amides into amines.

Which reagent converts benzenediazonium chloride into phenol?

1. CuCl
2. KI
3. Water on warming
4. HBr

Benzenediazonium chloride reacts with phenol in alkaline medium to produce:

1. Chlorobenzene
2. Azobenzene
3. p-Hydroxyazobenzene (Azo dye)
4. Benzoic acid

Which of the following is the correct order of basic strength in aqueous solution?

1. Aniline > Ethylamine > Ammonia
2. Ammonia > Ethylamine > Aniline
3. Ethylamine > Ammonia > Aniline
4. Aniline > Ammonia > Ethylamine

Primary aliphatic amines react with nitrous acid at 273-278 K to produce:

1. Diazonium salts
2. Alcohols with evolution of nitrogen gas
3. Nitro compounds
4. Ketones

Benzenediazonium chloride reacts with cuprous chloride (CuCl) to form chlorobenzene. This reaction is known as:

1. Finkelstein reaction
2. Hoffmann bromamide reaction
3. Sandmeyer reaction
4. Wurtz reaction

Gabriel phthalimide synthesis is mainly used for the preparation of:

1. Primary alkyl amines
2. Secondary amines
3. Tertiary amines
4. Aromatic amines

Which reagent is used in the Hinsberg test to distinguish primary, secondary and tertiary amines?

1. Bromine water
2. Benzenesulphonyl chloride (C6H5SO2Cl)
3. Concentrated HCl
4. Sodium nitrite

Aniline reacts with bromine water to give:

1. Bromobenzene
2. p-Bromoaniline
3. 2,4,6-Tribromoaniline
4. m-Bromoaniline

Which of the following compounds is the strongest base in aqueous solution?

1. Aniline
2. Ammonia
3. Ethylamine
4. Diphenylamine

Which of the following reactions is used for the preparation of primary amines from amides?

1. Sandmeyer reaction
2. Hoffmann bromamide reaction
3. Wurtz reaction
4. Cannizzaro reaction

Aniline reacts with sodium nitrite and hydrochloric acid at 273-278 K to form:

1. Phenol
2. Benzyl alcohol
3. Benzenediazonium chloride
4. Chlorobenzene

Which of the following amines gives a positive Carbylamine test?

1. Dimethylamine
2. Trimethylamine
3. Ethylamine
4. Diethylamine