JEE Main Chemistry question

Compound 'A' reacts with alcoholic KOH to yield compound 'B', which on ozonolysis followed by reaction with gives methanal and propanal. Compound 'A' is

(A)1-propanol
(B)1-butanol
(C)1-chlorobutaneCorrect
(D)1-chloropentane

Answer: (C)

Solution

Ozonolysis of 'B' followed by gives methanal (HCHO) and propanal (), so 'B' must be the terminal alkene CH_3CH_2-CH=CH_2 (1-butene), since ozonolysis cleaves the double bond to give one carbonyl fragment from each end. This alkene is obtained from

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Question ID VK-148023