| Answer | Crossword Clue |
|---|---|
| ETHANES | Some fuel gases |
| ISOBUTANES | Fuel gases |
| ETHANES | Fuel gases |
| INERTS | Some gases |
| NONSOLUBLE | Like some gases |
| RARE | Like some gases |
| INERT | Like some gases. |
| INERT | Like some gases |
| NOBLE | Like some gases |
| ANE | Ending for some gases |
| ANE | Suffix for some gases |
| INERT | Nonreactive, like some gases |
| INERT | Nonreactive, as some gases |
| INERT | Not reactive, as some gases |
| INERT | Non-reactive, like some gases |
