The following sequence of reactions on A gives

Nitrobenzene on treatment with zinc dust and aqueous ammonium chloride gives

• C₆H₅N =N-C₆H₅

• C₆H₅NH₂

• C₆H₅NO

• C6H₅NHOH.

Among the following which one does not act as an intermediate in Hofmann rearrangement?

• RNCO

• RCO$\stackrel{..}{\mathrm{N}}$

• RCO$\stackrel{..}{\mathrm{N}}$HBr

• RNC

724.

Pyridine is less basic than triethylamine because

• pyridine has aromatic character

• nitrogen in pyridine is sp² hybridised

• pyridine is a cyclic system

• in pyridine, lone pair of nitrogen is delocalised

Assertion: Anilinium chloride is more acidic than ammonium chloride.

Reason : Anilinium ion is resonance-stabilised.

• If both assertion and reason are true and reason is the correct explanation of the assertion.

• If both assertion and reason are true but reason is not the correct explanation of the assertion.

• If assertion is true, but reason is false.

• Both assertion and reason are false statements.

Hinsberg's reagent is :

In the reaction :

C₆H₅CHO + C₆H₅NH₂ $\to$ C₆H₅N=HCC₆H₅ + H₂O, the compound C₆H₅N=HCC₆H₅ is known as :

• aldol

• Schiffs base

• Schiff's reagent

• Benedict's reagent

IUPAC name of CH₃-CH(CH₂CH₃)-CH₂-CH(CN)-CH₃ is :

• 2-cyano-3-methylhexane

• 2.4-dimethylhexanenitrile

• 3-methyl-5-cyanohexane

• 2-cyano-3-methylhexane

Aromatic nitriles (ArCN) are not prepared by reaction:

• ArX + KCN

• ArN₂⁺+ CuCN

• ArCONH₂+ P₂O₅

• ArCONH₂+ SOCl₂

Melting points are normally the highest for

• tertiary amides

• secondary amides

• primary amides

• amines.