Aromatic nitriles (ArCN) are not prepared by reaction:
ArX + KCN
ArN2++ CuCN
ArCONH2+ P2O5
ArCONH2+ SOCl2
A.
ArX + KCN
Halogen have +I and +M effect by which its electron delocalized in benzene ring by resonance and due to its +I effect its bonded with benzene ring and cannot be substitute bt CN- and show the inertness against KCN while other option gives aromatic nitrile .
OR
(Aryl halides (ArX) does not undergo nucleophilic substitution because they have strong C−X bond due to resonance.)
Melting points are normally the highest for
tertiary amides
secondary amides
primary amides
amines.
The most suitable reagent for the conversion of
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
Assertion : lsobutanal does not give iodofonn test.
Reason : It does not have -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.