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.

The most suitable reagent for the conversion of

${\mathrm{RCH}}_2\mathrm{OH} \to \mathrm{RCHO} \mathrm{is}$

• KMnO₄

• K₂Cr₂O₇

• CrO₃

• PCC (pyridine chloro chromate).

Which of the following is a biodegradable polymer?

• Cellulose

• Polythene

• Polyvinyl chloride

• Nylon-6

Assertion : Carboxypeptidase is an exopeptidase.

Reason : It cleaves the N-terminal bond.

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

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

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion : Sucrose is a non-reducing sugar.

Reason : It has glycosidic linkage.

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

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

• If assertion is true but reason is false

• If both assertion and reason are false

57.

Assertion : lsobutanal does not give iodofonn test.

Reason : It does not have $\mathrm{\alpha }$-hydrogen.

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

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

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion : 2-bromobutane on reaction with sodium ethoxide in ethanol gives 1-butene as a major product.

Reason : 1-butene is more stable than 2-butene.

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

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

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion : The major products formed by heating C₆H₅CH₂OCH, with HI are C₆H₅CH₂I and CH₃OH.

Reason : Benzyl cation is more stable than methyl cation.

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

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

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion : Molar entropy of vaporisation of water is different from ethanol.

Reason : Water is more polar than ethanol.

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

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

• If assertion is true but reason is false

• If both assertion and reason are false.