JEE Main 2023 — Hydrocarbons Question with Solution
JEE Main 2023 (08 Apr Shift 1)
Question
Molar mass of the hydrocarbon (X) which on ozonolysis consumes one mole of per mole of (X) and gives one mole each of ethanal and propanone is ______ g mol–1 (Molar mass of C : 12 g mol–1 , H : 1 g mol–1 )
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Show full solutionCorrect answer: 70
Correct answer
70
Step-by-step explanation
When 2-methyl butene-2 is subjected to ozonolysis and then reduced in presence of dimethyl sulphide or Zn dust, it yields acetone and acetaldehyde. Cycloaddition of a molecule of ozone occurs first and then it is cleaved reductively to give aldehyde and ketone.
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This is a previous-year question from JEE Main 2023, covering the Hydrocarbons chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.