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Alcohols, Phenols and Ethers — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryAlcohols, Phenols and Ethers3 Marks
Question
A compound $(X)$ reacts with $PCl_5$ to form compound $Y.$ Compound $Y$ reacts with ethereal solution of magnesium to form compound $(Z),$ which on treating with propanone and further hydrolysis to give $2-$ Methyl propan$-2-ol.$ What are the compounds $X$ and $Y$ and also give the equations of the reactions.
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Answer

The final product is $3^\circ$ alcohol of four carbon, which is obtained by reacting compound $Z$ with propanone.
Therefore compound $Z$ is a carbon containing Grignard reagent, hence the starting compound will be a alcohol having one carbon. The reaction sequence will be as follows:
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