Question

which is the hardest variety if coal
options :
a) gas carbon
b) anthracite
c) charcoal
​

Answer 1

Anthracite

Anthracite: The highest rank of coal. It is a hard, brittle, and black lustrous coal, often referred to as hard coal, containing a high percentage of fixed carbon and a low percentage of volatile matter. Bituminous: Bituminous coal is a middle rank coal between subbituminous and anthracite.

Answer 2

Which is the hardest variety if coal

options :

a) gas carbon

b) anthracite(✓)

c) charcoal