RMgI when treated with ice cold water liberated a gas which occupied 1.4 dm ^3/ g at STP. The gas produced is further reacted with iodine in presence of HIO₃ to give compound (X). Compound (X) in presence of Na and dry ether produced compound (Y). Molar mass of compound (Y) is _______ g mol ⁻¹ . (Nearest integer)

Step-by-step solution

The reaction of Grignard reagent with water yields an alkane: RMgI + H₂O RH + Mg(OH)I Given that 1 g of the gas RH occupies 1.4 dm ^3 at STP, we can find its molar mass. Using the standard molar volume at STP ( 22.4 dm ^3 ): Molar mass of RH = 22.4 dm ^3 mol ⁻¹ 1.4 dm ^3 g ⁻¹ = 16 g mol ⁻¹ The alkane with a molar mass of 16 g mol ⁻¹ is methane ( CH₄ ). Methane reacts with iodine in the presence of an oxidizing agent like HIO₃ (which prevents the backward reaction by consuming the formed HI ) to give methyl iodide: