Capable of igniting and burning is a combustible gas. Any compressed gas meeting the requirements for lower flammability limit, flammability limit range, flame projection,etc. All flammable substances are surely combustible, but all combustible substances are not essentially flammable.
Yes it is slightly flammable.
concentration of a flammable gas in air
Flammable gas will burn. Toxic gas is poisonous. A gas can be toxic, but not flammable, flammable but not toxic, both, or neither.
Yes. Methane gas is highly flammable, which is why we burn it as fuel.
Corrosive, but it also 'burns' with hydrogen gas
Helium is the lighter gas but hydrogen is very flammable
Hydrogen gas is not combustible (ignition temperature > 100 degrees C), it is flammable (ignition temperature < 100 degrees C -- in fact, if you have gaseous hydrogen, it'll burn.)
Class 2 gas only means it's compressed and includes flammable/combustible, poisonous and inert (non-flammable, non-toxic) gases. You would only need a fire extinguisher for flammable gas, which is Class B.
- compressed gas - oxidizing material - flammable and combustible material
Neon is not a combustible gas.
Flammability is a measure of how easily a gas, liquid, or solid will ignite and how quickly the flame, once started, will spread. Flammable liquids themselves are not flammable; rather, the vapor from the liquids are combustible.