Chemistry
Grade-8
Easy
Question
Which of the following is incorrect about diamond?
i. It is soft in nature.
ii. It has high density.
iii. It has high melting point.
iv. It is soluble in all solvents.
- i
- ii
- iii
- i & iv
Hint:
Diamond has the strongest tetrahedral structure. It has a lattice structure has strong covalent bond.
The correct answer is: i & iv
The correct option is d)i & iv.
- Diamond is harder because its carbon atoms are bonded in a stronger tetrahedral pattern, whereas graphite's carbon atoms are bonded in layers, with only weak Vanderwall forces holding the layers together. It is soft and slippery.
- Diamond is composed of carbon atoms that form a lattice structure. It has a huge shared structure. The covalent bond here is very strong. Therefore, no force can be introduced by a solvent strong enough to break these covalent bonds and dissolve the structure.
- Diamond is harder because its carbon atoms are bonded in a stronger tetrahedral pattern, whereas graphite's carbon atoms are bonded in layers, with only weak Vanderwall forces holding the layers together. It is soft and slippery.
- Diamond is composed of carbon atoms that form a lattice structure. It has a huge shared structure. The covalent bond here is very strong. Therefore, no force can be introduced by a solvent strong enough to break these covalent bonds and dissolve the structure.
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