McqMate
Q. |
The hardest natural substance is - |
A. | Diamond |
B. | Iron |
C. | Graphite |
D. | Copper |
Answer» A. Diamond | |
Explanation: Diamond is the hardest naturally occurring substance found on Earth. It is due to the giant molecular structure of diamond in which each carbon atom is covalently bonded to four other carbon atoms |
View all MCQs in
Biology (GK)No comments yet