Question

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Answer 1

Answer:

1.rapid chemical combination of a substance with oxygen, involving the production of heat and light.

2LPG is composed hydrocarbons containing three or four carbon atoms. The normal components of LPG thus, are propane (C3H8) and butane (C4H10). Small concentrations of other hydrocarbons may also be present. LPG burns readily in air and has an energy content similar to petrol and twice the heat energy of natural gas.

Answer 2

Answer:

1:- Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is called the fuel, and the source of oxygen is called the oxidizer.

2:- Components of LPG:- propane (C3H8) and butane (C4H10).

3:- Saturated hydrocarbon gives clean colour flame.

4:- unsaturated carbon gives yellow flame.

Explanation:

I am sending last one.