Question

Which of the following artificial substances is harder that diamond?

• A. Chrome steel
• B. Carborundum (silicon carbide)
• C. Adamantane
• D. Borazon (boron nitride)

Answer 1

Answer: (B)

Carborundum (silicon carbide)

Silicon carbide ($SiC$), also known as carborundum, is a semiconductor containing silicon and carbon. It occurs in nature as the extremely rare mineral moissanite.

It is an artificial substance which is harder than a diamond.

Hence option B is the correct answer.