| Hint | Answer | % Correct |
|---|---|---|
| Gas that makes up 78% of the atmosphere | Nitrogen | 100%
|
| Colorless, odorless toxic gas that is produced when fuel is burned | Carbon monoxide | 92%
|
| In stars, hydrogen gets fused into this gas | Helium | 85%
|
| Lightest gas | Hydrogen | 85%
|
| Combustion happens because of this gas | Oxygen | 85%
|
| Radioactive noble gas | Radon | 85%
|
| A product of cellular respiration | Carbon dioxide | 77%
|
| Yellow-green toxic gas that smells strongly like bleach | Chlorine | 77%
|
| Used as an anesthetic and is also called laughing gas | Nitrous oxide | 69%
|
| There's a layer of it in the stratosphere that protects us from UV radiation | Ozone | 69%
|
| At STP, one mole of any gas is this number of liters | 22.4 | 15%
|
| Pale yellow gas that is highly toxic and highly reactive | Fluorine | 8%
|
| Smells like rotten eggs and is also known as swamp gas | Hydrogen sulfide | 8%
|
| Described as smelling like hay; it was used as a weapon in WWI | Phosgene | 0%
|
| Heaviest gas | Tungsten hexafluoride | 0%
|