Aldehydes and KetonesReactivity of Methanal16Choose the best answerMethanal is exceptionally reactive toward nucleophilic addition because:AIt lacks an α-hydrogen atom.BIt has no steric hindrance from alkyl groups and no +I effect.CIt is highly resonance-stabilized.DIts carbonyl bond is less polar. Like 0 Discuss 0Share
Aldehydes and KetonesPreparation of Aldehydes by Dehydrogenation17Choose the best answerWhich alcohol gives butanal on dehydrogenation over heated copper?AButan-2-olBButan-1-olC2-Methylpropan-2-olD2-Methylpropan-1-ol Like 0 Discuss 0Share
Aldehydes and KetonesIodoform Test18Choose the best answerWhich compound gives a positive iodoform test?A2-PhenylethanolBPentanalCPentan-3-olD1-Phenylethanol Like 0 Discuss 0Share
Aldehydes and KetonesAldol Condensation19Choose the best answerWhich of the following undergo aldol condensation? (1) Methanal (2) 2-Methylpentanal (3) Benzaldehyde (4) Benzophenone (5) Cyclohexanone (6) 1-Phenylpropan-1-one (7) Phenylacetaldehyde (8) Butan-1-ol (9) 2,2-DimethylbutanalA(2), (5), (6), (7)B(3), (4)CAll of theseDNone of these Like 0 Discuss 0Share
Aldehydes and KetonesIodoform Test20Choose the best answerWhich compound does NOT give the iodoform test?APentan-3-oneBPentan-2-oneCEthanolDEthanal Like 0 Discuss 0Share