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A gaseous hydrocarbon gives upon combust...

A gaseous hydrocarbon gives upon combustion, 0.72 g of water and 3.08 g of `CO_(2)`. The empirical formula of the hydrocarbon is

A

`C_2H_4`

B

`C_3 H_4`

C

`C_6H_5`

D

`C_7H_8`

Text Solution

Verified by Experts

The correct Answer is:
D
`18 g H_2O` contains 2g H
`:. 0.72g H_2O` contains 0.08 g H
44g `CO_2` contains 12 g C
`:. 3.08g CO_2` contains 0.84 g C
`:. C: H = 0.84/12 : 0.08/1 = 0.07 : 0.08`
` = 7 : 8`
`:.` Empirical formula ` = C_7H_8`
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