Question

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

Answer 1

X is carbon
Y is diamond
Z is graphite

Answer 2

Answer: X is carbon. Y is diamond. Z is graphite.

Explanation:

Y is the hardest known substance. We know that diamond is the hardest known substance. Hence, Y is a diamond.

Diamond is a form of carbon. So the non-metal X is carbon.

Non-metals are generally bad conductors of electricity. Carbon has a form, called graphite, which is a good conductor of electricity. So, Z is graphite.

Fun Fact:

Graphite is also used in pencils. The black shiny thing inside a pencil, which we normally call pencil lead, is actually graphite.