Why is diamond very hard?
Answer and explanation
Correct answer: Because each carbon forms strong bonds with four other carbon atoms
Diamond has a giant three-dimensional covalent network rather than separate weakly held molecules. Each carbon atom is covalently bonded to four neighboring carbon atoms in a rigid tetrahedral arrangement. Breaking or deforming this continuous network requires substantial energy, so diamond is extremely hard. Option A is correct. Option B describes the layered structure of graphite, and options C and D contradict diamond’s actual bonding and composition.
Frequently asked questions
What is the correct answer to this question?
Because each carbon forms strong bonds with four other carbon atoms
Why is this the correct answer?
Diamond has a giant three-dimensional covalent network rather than separate weakly held molecules. Each carbon atom is covalently bonded to four neighboring carbon atoms in a rigid tetrahedral arrangement. Breaking or deforming this continuous network requires substantial energy, so diamond is extremely hard. Option A is correct. Option B describes the layered structure of graphite, and options C and D contradict diamond’s actual bonding and composition.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Carbon and its Compounds.
