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(A) The reactivity of carbonyl compounds towards nucleophilic addition depends on the electrophilicity of the carbonyl carbon.$1.$ Acid chloride $(RCO

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$I > II > III > IV$

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(A) The reactivity of carbonyl compounds towards nucleophilic addition depends on the electrophilicity of the carbonyl carbon.$1.$ Acid chloride $(RCOCl)$: The highly electronegative chlorine atom exerts a strong $-I$ effect,significantly increasing the electrophilicity of the carbonyl carbon.$2.$ Aldehyde $(RCHO)$: Has one alkyl group which is electron-donating ($+I$ effect),making it less reactive than acid chloride.$3.$ Ketone $(RCOR)$: Has two alkyl groups,which increase electron density on the carbonyl carbon more than in an aldehyde,reducing its electrophilicity.$4.$ Ester $(RCOOR')$: The alkoxy group $(-OR')$ shows a $+M$ effect (resonance),which donates electron density to the carbonyl carbon,making it the least reactive towards nucleophilic addition.Thus,the decreasing order of reactivity is $I > II > III > IV$.The correct option is $A$.

Arrange these compounds in decreasing order of reactivity for the nucleophilic addition reaction :
$I.$ Acid chloride $II.$ Aldehyde
$III.$ Ketone $IV.$ Ester
Select the correct answer from the codes given below :

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Arrange these compounds in decreasing order of reactivity for the nucleophilic addition reaction :$I.$ Acid chloride $II.$ Aldehyde$III.$ Ketone $IV.$ EsterSelect the correct answer from the codes given below :