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Hydrocarbons
Reactions of Alkenes – Ozonolysis
2 questions from 2 papers, each with its answer.
- questions
- 2
- papers
- 2
- years asked, 2017–2026
- 2 of 10
- of Hydrocarbons
- 2.67%
Appears in
Concepts tested
- identify alkene from ozonolysis products
- identifying an alkene from ozonolysis products
All Questions
2022 1 question
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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:$CH_3-CH(CH_3)-CH=CH_2 \xrightarrow[(ii)\ Zn/H_2O]{(i)\ O_3} (CH_3)_2CH-CHO + HCHO$ 2-methylpropanal + formaldehyde So X is 3-methylbut-1-ene.
2020 1 question
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An alkene on ozonolysis gives methanal as one of the product. Its structure is:
Ozonolysis gives methanal (HCHO) only if the alkene has a terminal $=CH_2$ group.
$C_6H_{11}-CH_2-CH=CH_2 \xrightarrow[(ii)\ Zn/H_2O]{(i)\ O_3} C_6H_{11}-CH_2-CHO + HCHO$
So the alkene is allylcyclohexane (cyclohexyl–$CH_2$–CH=$CH_2$).