what r the gases present in atmospheric air which should be able to burn?

Answer 1

Oxygen only.

Answer 2

There are many gases in the atmosphere.
Oxygen is an oxidant and is a supporter of combustion.But oxygen does not burn by itself. The gas which can be used as fuel is hydrogen.It has a high calorific value and is a good fuel. But is very dangerous hence must be used carefully.
Nitrogen is an inert gas and does not support combustion . This is the reason why there is no problem when we light the matchstick since the atmosphere is filled with 77% Nitrogen but only 22% oxygen. If Oxygen is in excess then on lighting a small fire leads to burning of a large area though it is only a supporter of combustion

Answer 3

Burn as a fuel, or burn as an oxidant? Burning is the process of reacting a fuel with an oxidant. The only oxidant in the atmosphere is oxygen. None of the other atmospheric gases react with it under normal circumstances, although dinitrogen isn't absolutely inert, and can be persuaded to oxidise under certain conditions. Hence a car's spark plugs can produce tiny quantities of nitrogen oxides, because the electrical discharge provides enough energy to overcome the 'activation barrier' (the minimum energy needed to start the reaction).

Answer 4

There are no flammable gases in our atmosphere in large amounts. If there were, the air would constantly be burning. There are trace amounts of all gases in the atmosphere.