Diamond is hard becauseA. All the four valence electrons are bonded to each carbon atom by covalent bondsB. It is a giant moleculeC. It is made up of carbon atoms.D. It cannot be burnt.

Diamond is hard becauseA. All the four valence electrons are bonded to

1.	Diamond is hard becauseA. All the four valence electrons are bonded to each carbon atom by covalent bondsB. It is a giant moleculeC. It is made up of carbon atoms.D. It cannot be burnt.
Answer» Correct Answer - A In diamond, each carbon atom is in `sp^(3)` hybridized state and linked to four other carbon atoms tetrahedrally by covalent bonds. As the atoms are held firmly by strong covalent bonds. So diamond is hardest substance.

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Diamond is hard becauseA. All the four valence electrons are bonded to each carbon atom by covalent bondsB. It is a giant moleculeC. It is made up of carbon atoms.D. It cannot be burnt.

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