JEE Main Chemistry question

An organic alkadiene on reductive ozonolysis produces (i) acetaldehyde (ii) acetone (iii) 2-methylpropane-1,3-dial. The formula of the alkadiene will be [Indraprastha CET 2009, CPMT 2009]

(A)CHCH=CH–CH(CH)–CH=C(CH)Correct
(B)CHCH=CH–CH(CH)–CH=CH–CH
(C)(CH)C=CH–CH(CH)–CH=CHCH
(D)CHCHCH=CH–CH(CH)=CHCH

Answer: (A)

Solution

Acetaldehyde (CHCHO) comes from a terminal =CH–CH carbon; acetone [(CH)C=O] from a terminal =C(CH) carbon; and 2-methylpropane-1,3-dial [OHC–CH(CH)–CHO] from the central carbon flanked by the two alkene

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Question ID VK-142233