JEE Main 2022 · 27 Jun · Shift 1 · Chemistry Q74

← JEE Main 2022 · 27 Jun · Shift 1

ChemistrySingle correct+4 / -1Question 74 of 90

'A' and 'B' respectively are :
$\mathrm A\xrightarrow[(2)\ \mathrm{Zn\text{-}H_2O}]{(1)\ \mathrm O_3}\text{Ethane-1,2-dicarbaldehyde}+\text{Glyoxal/Oxaldehyde}$
$\mathrm B\xrightarrow[(2)\ \mathrm{Zn\text{-}H_2O}]{(1)\ \mathrm O_3}\text{5-oxohexanal}$

1-methylcyclohex-1,3-diene & cyclopentene.

Cyclohex-1,3-diene & cyclopentene

1-methylcyclohex-1,4-diene & 1-methylcyclopent-1-ene

Cyclohex-1,3-diene & 1-methylcyclopent-1-ene

Answer and worked solution

Official answer: D

A. Ozonolysis giving $\mathrm{OHC\text{-}CH_2CH_2\text{-}CHO}$ and glyoxal comes from cyclohexa-1,3-diene.

B. 5-Oxohexanal, $\mathrm{CH_3CO(CH_2)_3CHO}$ , comes from 1-methylcyclopentene.

(D)

Topics:Alkenes

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JEE Main 2022 · 27 Jun · Shift 1, Chemistry question 74