Question

what is a coal. Give one example​

Answer 1

Explanation:

Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other elements.

Example:-

chiefly hydrogen, sulfur, oxygen, and nitrogen.

Answer 2

Explanation:

coal is a hard rock which can be burned as a fossil fuel it is mostly carbon but also contain hydrogen ,sulphur ,oxygen, nitrogen........coal can be burnt for heat or energy