Question: If coal gas is a gas then how is it used as a fuel? Edit
Answer: A substance that produces useful energy when it undergoes a chemical or nuclear reaction is called Fuel. It can be solid, liquid or gaseous. Examples of Fuel:
1. wood, coal, gas, or oil burned to produce heat or power.
2. 238U in Nuclear reactor.
3. Food is also a fuel as it gives us energy when metabolized in our body.
Coal gas is a flammable gaseous fuel. Coal gas is obtained during the distillation of bituminous coal. And it is a gaseous mixture—mainly hydrogen, methane, and carbon monoxide and it is used as a fuel for both domestic and commercial purpose. Edit
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