Question

why domestic gas burns with blue flame
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Answer 1

Answer:

heya mate ☺

A blue flame colour means complete combustion. This indicates that the gas is being burned efficiently without any unburned and wasted gas. With complete combustion you get the maximum heat output from your gas and use less gas to generate heat with whatever appliance you are using.

Answer 2

Explanation:

because we use LPG that's why domestic gas burns blue flame

and LPG gas never contain co2 in it

and it never affect from external air pressure