A non-metal X exists in two different forms Y and Z. Y is the hardest natural substance, whereas Z is a good conductor of electricity. Identify X, Y and Z.

Question

Philoid · Accepted Answer

X is carbon, Y is diamond and Z is graphite.

Explanation: Carbon (X) is a non-metal that can exist in different forms. Each form is called allotrope.

i. Diamond(Y) is the hardest natural substance. It is an allotrope of carbon

ii. Graphite (Z) is a good conductor of electricity. It is an another allotrope of carbon.

Note: Fullerene is also an allotrope of carbon.