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

Bihar BoardEnglish MediumSTD 12 ScienceChemistryAlcohols, Phenols and Ethers3 Marks
Question
A compound (X) reacts with PCl5 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 3º 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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