Topic: Alkenes: ozonolysis and polymerization· Hydrocarbons

Compound X on reaction with O_3 followed by Zn/H_2O gives formaldehyde and 2-methyl propanal as products. The compound X is :

1. Pent-2-ene

2. 3-Methylbut-1-ene

3. 2-Methylbut-1-ene

4. 2-Methylbut-2-ene

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Answer: 2. 3-Methylbut-1-ene

Key idea: ozonolysis cuts the C=C bond and puts a C=O on each carbon.

Working backwards: \(\mathrm{HCHO}\) and \(\mathrm{(CH_3)_2CH{-}CHO}\) join through a C=C to give \(\mathrm{CH_2{=}CH{-}CH(CH_3)_2}\), which is 3-methylbut-1-ene.

Check the others: pent-2-ene gives ethanal + propanal; 2-methylbut-1-ene gives HCHO + butanone; 2-methylbut-2-ene gives propanone + ethanal.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Compound X on reaction with O_3 followed by Zn/H_2O gives formaldehyde and 2-methyl propanal as products. The compound X is :

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