What is the most common gas in a volcanic eruption?

Answer 1

I'm not really sure, so don't take my answer right away, but i think it is oxygen because you need the oxygen to make the fire. Or, it is carbon monoxide because that is whats released from most smokes. Sorry if I couldn't give you the correct answer.

Answer 2

The most common gases associated with active volcanoes are water vapor, carbon dioxide, sulfur dioxide, hydrogen sulfide, hydrogen, helium, carbon monoxide, and hydrochloric acid. Lesser amounts of hydrofluoric acid, nitrogen, argon, and other compounds are commonly associated with active volcanoes as well. Volcanic gases rarely reach populated areas in lethal concentrations, although sulfur dioxide can react with the atmosphere downwind and fall as acid rain to cause corrosion and a host of other effects. People with respiratory or Heart diseases are especially susceptible to volcanic gases (fume). Carbon dioxide is heavier than air and tends to collect in depressions, where it can occur in lethal concentrations and cause suffocation. On occasion, toxic concentrations of fluorine from hydrofluoric acid have been absorbed onto ash and ingested by livestock or leached into domestic water supplies.

Answer 3

water vapor, carbon dioxide, hydrogen chloride and sulfur dioxide are common

Answer 4

1. Carbon Dioxide
2. Steam
3. Sulphur Dioxide.