Question

Which of the following is the hardest material?

• A. Diamond.
• B. Graphene.
• C. Iron.
• D. Silicon carbide.

Hint:

Diamond is the hardest known material due to its strong covalent bonds and unique crystal lattice structure.

Answer 1

The Correct Option is A

Step 1: Understanding hardness.
Hardness is a measure of how resistant a material is to deformation, scratching, or indentation. Step 2: Diamond's unique structure.
Diamond is the hardest naturally occurring material because of its unique crystal structure. Each carbon atom in diamond is covalently bonded to four other carbon atoms in a tetrahedral arrangement, which gives it exceptional strength and hardness. Step 3: Conclusion.
Thus, diamond is the hardest material.