Jerry prefers to burn bituminous coal in his fireplace because of the yellow flame. What causes that flame color?

A.

low carbon content

B.

high sulfur content

C.

high methane content

D.

softer structure

E.

lower heat value

The correct answer is B. High sulfur content.

Bituminous coal when burned produces yellow flames reason being combustion of hydrocarbons which are in the col are incomplete.

Another reason why bituminous burns in yellow colour is because of having different impurities for example, sulfur.

Incadence of soot particles which are very fine can also produce yellow flames.

B. High sulfur content