| Answer | Crossword Clue |
|---|---|
| PROPANE | Hydrocarbon in petroleum. |
| HEXANE | Hydrocarbon in petroleum |
| OCTANE | Hydrocarbon in petroleum. |
| CETANE | Oily hydrocarbon in petroleum |
| OCTANE | Oily hydrocarbon in petroleum. |
| PENTANE | Petroleum hydrocarbon |
| PENTANE | Petroleum hydrocarbon. |
| HEXANE | Hydrocarbon obtained from petroleum |
| BUTENE | Hydrocarbon derived from petroleum |
