Question

Statement 1: Pure diamond is the hardest natural substance.

Statement 2: In diamond, every carbon atom is bonded to four neighbouring carbon atoms by covalent bonds.

• A. Both statements are correct but statement 2 is not the correct reason for statement.
• B. Both statements are correct and statement 2 is the reason for statement 1.
• C. Statement 1 is incorrect.
• D. Statement 2 is incorrect.

Answer 1

The correct option is B

Both statements are correct and statement 2 is the reason for statement 1.

Diamond is an allotrope of carbon. In diamond, each carbon is covalently bonded to four other carbon atoms, making a rigid 3-D structure as shown below. These bonds are difficult to break, which makes diamond the hardest natural substance.