An alkene on ozonolysis gives methanal as one of the product. Its structure is : 1. Cyclohexyl-CH=CH-CH ₃ 2. Cyclohexene ring (ring double bond) bearing - CH ₂- CH ₂- CH ₃ 3. Cyclohexyl-CH ₂ -CH=CH ₂ 4. Cyclohexene ring (ring double bond) bearing - CH ₂ CH ₂ CH ₃

Answer: 3. Cyclohexyl-CH ₂ -CH=CH ₂ Ozonolysis cleaves C=C and gives a carbonyl on each carbon. Methanal (HCHO) comes only from a terminal =CH₂ group. Option (3), cyclohexyl- CH₂-CH=CH₂ , has a terminal =CH₂ : products are cyclohexylacetaldehyde and HCHO. Option (1) gives ethanal; options (2) and (4) have a ring double bond and give a dialdehyde, no HCHO.

Topic: Alkenes: ozonolysis and polymerization· Hydrocarbons

An alkene on ozonolysis gives methanal as one of the product. Its structure is :

four cyclohexane/cyclohexene structures with side chains

1. Cyclohexyl-CH=CH-CH\(_3\)

2. Cyclohexene ring (ring double bond) bearing \(-\)CH\(_2-\)CH\(_2-\)CH\(_3\)

3. Cyclohexyl-CH\(_2\)-CH=CH\(_2\)

4. Cyclohexene ring (ring double bond) bearing \(-\)CH\(_2\)CH\(_2\)CH\(_3\)

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Answer: 3. Cyclohexyl-CH\(_2\)-CH=CH\(_2\)

Ozonolysis cleaves \(\mathrm{C=C}\) and gives a carbonyl on each carbon. Methanal (HCHO) comes only from a terminal \(=\mathrm{CH_2}\) group.

Option (3), cyclohexyl-\(\mathrm{CH_2-CH=CH_2}\), has a terminal \(=\mathrm{CH_2}\): products are cyclohexylacetaldehyde and HCHO.
Option (1) gives ethanal; options (2) and (4) have a ring double bond and give a dialdehyde, no HCHO.

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

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An alkene on ozonolysis gives methanal as one of the product. Its structure is :

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