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    				| 1. | A gaseous hydrocarbon has 85% carbon and vapour density of 28. The possible formula of the hydrocarbon will beA. `C_(3)H_(6)`B. `C_(2)H_(4)`C. `C_(2)H_(2)`D. `C_(4)H_8` | 
| Answer» Correct Answer - D Mol . Wt. 2 x Vapour density =2 x 28 =56 | |