Identify the gas(es) which is released when coal is burnt in the presence of air.
Carbon dioxide
Carbon monoxide
Both Carbon dioxide and Carbon monoxide
Nitrogen
Coal contains Carbon. When burnt in air, it reacts with the oxygen gas in air producing mainly carbon dioxide gas.
When coal is burnt in the presence of air, gas 'X' is released. Identify the gas 'X'.
Identify the gas most produced when coal is burnt in the presence of air.
Identify the gas that is generally produced when coal is burnt in the presence of excess air.
Identify the gas that is generally produced when coal is burnt in the presence of a lot of air.