Question

The hardest natural substance is:

• A. Iron
• B. Gold
• C. Silver
• D. Diamond

Hint:

Diamond is used in cutting tools due to its extreme hardness.

Answer 1

The Correct Option is D

Step 1: Fact.
Diamond is made of pure carbon atoms arranged in a rigid tetrahedral structure.
Step 2: Hardness.
This structure makes diamond the hardest natural substance on Mohs hardness scale.
Step 3: Conclusion.
Hence, diamond is the hardest natural substance.