| Answer | Crossword Clue |
|---|---|
| ETHANE | Gas found in crude petroleum. |
| propane | a heavy flammable gaseous alkane C3H8 found in crude petroleum and natural gas and used especially as fuel and in chemical synthesis |
| ETHANE | Gas in crude petroleum |
| PENTANE | Gas found in petroleum. |
| mesitylene | a colourless liquid that occurs in crude petroleum; 1,3,5-trimethylbenzene |
| mesitylenes | MESITYLENE, a colourless liquid that occurs in crude petroleum; 1,3,5-trimethylbenzene |
