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JEE Main 2022 Chemistry question

ChemistryAlcohols, Phenols and EthersJEE Main 2022

A sample of 4.5 mg of an unknown monohydric alcohol, R–OH was added to methylmagnesium iodide. A gas is evolved and is collected and its volume measured to be 3.1 mL. The molecular weight of the unknown alcohol is g/mol. [Nearest integer]

Answer: 33

Solution

R–OH + R–OMgI + . The moles of alcohol equal the moles of methane. Taking the molar volume as

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Question ID VK-024711