MHTCET 10 May 2024 Shift 1 Paper

Concept:Grignard reagents react with compounds having acidic hydrogen, like alcohols, to form alkanes.Explanation:$\mathrm{CH}_{3}\mathrm{MgX}$ is a Grignard reagent with a strongly basic $\mathrm{CH}_{3}^{-}$ group.In $\mathrm{CH}_{3}\mathrm{OH}$, the hydrogen attached to oxygen is acidic.The $\mathrm{CH}_{3}^{-}$ abstract this proton, forming methane gas, $\mathrm{CH}_{4}$.The remaining $\mathrm{MgX}(\mathrm{OCH}_{3})$ is the magnesium alkoxide by-product.Thus, the reaction is:$$\mathrm{CH}_{3}\mathrm{OH} + \mathrm{CH}_{3}\mathrm{MgX} \longrightarrow \mathrm{CH}_{4} + \mathrm{MgX}(\mathrm{OCH}_{3})$$Hence, the product $P$ is methane.Answer:C. $\mathrm{CH}_{4}$