JEE Chemistry Online Test Aldehydes Ketones And Carboxylic Acids Set G

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Question 1

Question

Aldehydes are generally more reactive than ketones in
nucleophilic addition reactions. Which of the following statements accounts for this ?
(i) Sterically, the presence of two relatively large substituents in ketones hinders the approach of nucleophile to carbonyl carbon
(ii) Aldehydes show resonance whereas ketones do not
(iii) Electronically, the presence of two alkyl groups reduce the electrophilicity of the carbonyl carbon more effectively.
(iv) Electronically carbonyl carbon atom in ketones is more electrophilic than in aldehydes

Answer

(i) and (iii)

(ii) and (iii)

(ii) and (iv)

(i) and (iv)