| Answer | Crossword Clue |
|---|---|
| METHANES | Gaseous hydrocarbons. |
| oilgas | a gaseous mixture of hydrocarbons used as a fuel |
| oilgases | OILGAS, a gaseous mixture of hydrocarbons used as a fuel |
| butylenes | any of three isomeric, gaseous hydrocarbons having the formula C4H8, of the alkene series |
| butene | any of three isomeric, gaseous hydrocarbons having the formula C4H8, of the alkene series |
| butenes | any of three isomeric, gaseous hydrocarbons having the formula C4H8, of the alkene series |
