Compound X (molecular formula, C_5H_8O) does not react appreciably with Lucas reagent at room temperature but gives a

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Q 2607278188.     Compound X (molecular formula, C_5H_8O) does not react appreciably with Lucas reagent at room temperature but gives a precipitate with ammoniacal silver nitrate with excess of MeMgBr, 0.42 g of X gives 224 mL of CH_4 at STP. Treatment of X with H_2 in presence of Pt catalyst followed by boiling with excess HI, gives n-pentane. Suggest structure for X and write the equation involved.
JEE 1992

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