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Which alkene on ozonolysis gives CH3CHO and CH3CH3?

1. CH3CH2CH = CHCH3
2. CH3CH = CHCHCH3
3. CH3CH2CH = CHCH3
4. CH3 − C = CCHCH3 | CH3

Correct answer: CH3CH2CH = CHCH3

Solution

Ozonolysis cleaves the double bond in alkenes, forming carbonyl compounds. For CH3CH2CH=CHCH3, the cleavage produces CH3CHO (acetaldehyde) and CH3CH3 (ethane).

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