Paragraph: An acylic hydrocarbon $P$, having molecular formula $\mathrm{C}_6 \mathrm{H}_{10}$, gave acetone…

Paragraph: An acylic hydrocarbon $P$, having molecular formula $\mathrm{C}_6 \mathrm{H}_{10}$, gave acetone as the only organic product through the following sequence of reactions, in which $Q$ is an intermediate organic compounds.
Question: The structure of the compound $Q$ is




Solution

Explained in the beginning.

Asked in: JEE Advanced 2011 (Paper 1)

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