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A hydrocarbon contains 10.5 g of carbon ...

A hydrocarbon contains `10.5 g` of carbon per gram of hydrogen. `1 L` of vapour of the hydrocarbon at `127^(@)C` and 1 atm pressure weighs `2.8 g`. Find the molecular formula of the hydrocarbon.

A

`C_(7)H_(8)`

B

`C_(6)H_(10)`

C

`C_(7)H_(6)`

D

`C_(6)H_(12)`

Text Solution

Verified by Experts

The correct Answer is:
A
`"Volume at NTP"=(p_(1)xxV_(1))/(T_(1))xx(T_(2))/(P_(2))`
`=(1xx1)/(400)xx(273)/(1)=(273)/(400)" litre"`
`because " 22.4 litres "(" 1 mole. Weighs "=(2.8xx400)/(273)xx22.4g=91.8974~~92g)`
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