A compound 'X' is a gaseous hydrocarbon. It decolourises bromine water. It forms monochloro product 'Y' with gaseous HCl. the molecular weight of 'Y' is 64.5. Identify compounds 'X' and 'Y'. Also, write the reactions involved.

The compound x is CH2=CH2 .

CH2=CH2  + HCl  →  C2H5Cl . So y =  C2H5Cl which has molecular weight 64.5.

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compound x is methane and compound y is CH3Cl.

CH4 + Cl2 --------------------- CH3Cl  +  HCl  (in the presence of sunlight)

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