1.

A hydrocarbon (X) with vapour density = 27 containing C = 88.88% decolourizes KMnO_(4) and Br_(2) water without evolving HBr. It gave no ppt. with ethereal ammonical AgNO_(3) or Cu_(2)CI_(2) When reacted with dil. H_(2)SO_(4) in the presence of mercuric sulphate, methyl ethyl ketone (Y) is formed. The compound is

Answer»

`C_(8)H_(12)`
`C_(4)H_(6)`
`C_(2)H_(3)`
`C_(5)H_(10)`

SOLUTION :Based on the percentages (88.88% C and 11,12% H) its emphirical formula `C_(2)H_(3)` `MW = 2 XX 27 = 54 , MF = C_(4)H_(6)`


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