1.

A gaseous hydrocarbon requires 6 times its own volume of O_(2) for complete oxidation and produces 4 times its volume of CO_(2). What is its formula ?

Answer»

Solution :The balanced EQUATION for combustion
`C_(x) H_(y)+(x+(y)/(4))O_(2) rarr xCO_(2) +(y)/(2) H_(2)O`
1 VOLUME `(x+(y)/(4))` volume
`therefore x+(y)/(4)=6` (by equation)
or 4x+y=24
Again x=4 since evolved `CO_(2)` is 4 times that of hydrocarbon
`therefore 16 +y=24" or "y=8 therefore` formula of hydrocarbon `C_(4)H_(8)`


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