Biogas is an excellent fuel burns without smoke and leaves no residue like ash in wood. Its main constituent is-(A) 75% methane(B) 80% methane(C) 85% methane(D) 90% methane

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1.	Biogas is an excellent fuel, burns without smoke and leaves no residue like ash in wood. Its main constituent is:-(A) 75% methane(B) 80% methane(C) 85% methane(D) 90% methane
Answer» Correct option -: A) 75% methane

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Biogas is an excellent fuel, burns without smoke and leaves no residue like ash in wood. Its main constituent is:-(A) 75% methane(B) 80% methane(C) 85% methane(D) 90% methane