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A hydrocarbon contains 10.5 gm carbon an...

A hydrocarbon contains `10.5 gm` carbon and `1 gm` hydrogen. Its `2.4 gm` has `1 L` volume at `1 atm` and `127^(@)C`, hydrocarbon is

A

`C_(6)H_(7)`

B

`C_(6)H_(8)`

C

`C_(5)H_(6)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
`C = 10.5 g = 10.5/2 "mol" = 0.87` mol
`H =1/1 = 1` mol
`therefore (C_(0.87)H_(1))_(7) = C_(6.09) H_(7) = C_(6)H_(7)`
`PV = nRT, PV = w/m = RT`
`1 xx 1 = 2.4/m xx 0.082 xx 400`
`m = 2.4 xx 0.082 xx 400 = 78.42 = 79`
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