| Answer | Crossword Clue |
|---|---|
| oxygens | colorless, odorless gas necessary to life |
| oxygen | colorless, odorless gas necessary to life |
| ETHANE | Colorless, odorless gas |
| ARGON | Odorless, colorless, inert gas |
| methane | colorless, odorless, flammable gas |
| nitrogen | colorless, odorless, tasteless gas |
| ETHANE | Colorless, odorless gas used as fuel |
| ethanes | colorless, odorless, flammable gas used chiefly as a fuel |
| ethane | colorless, odorless, flammable gas used chiefly as a fuel |
| hydrogen | A colorless, odorless, highly flammable gas, the chemical element of atomic number 1 |
| ethane | a colorless odorless gaseous alkane C2H6 found in natural gas and used as a fuel |
