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Gases: starting with C

Name a gas that starts with C. Hopdown accepts 26 answers here. Common answers keep your bunny near the surface; rare ones dig deeper. Any substance that is a gas at room temperature and normal pressure. Canonical name starts with C.

Part of Gases.

Answers

• Carbon DioxideCommon
• Carbon MonoxideCommon
• ChlorineUncommon
• Carbon TetrafluorideUncommon
• CyanogenUncommon
• Carbonyl SulfideRare
• Chlorine DioxideRare
• Coal GasRare
• Compressed Natural GasRare
• CyclopropaneRare
• ChloromethaneRare
• Chlorine TrifluorideRare
• Cyanogen ChlorideRare
• Carbonyl ChlorideRare
• ChloroethaneRare
• ChlorotrifluoroethyleneVery rare
• ChlorodifluoromethaneVery rare
• CyclobutaneVery rare
• Carbon SuboxideVery rare
• Chlorine MonoxideVery rare
• CH4Very rare
• Cl2Very rare
• C2H2Very rare
• C3H8Deep cut
• C4H10Deep cut

Plus 1 more answers you'll have to find yourself.