The covalent crystals _ have giant molecules that are insoluble in all the solvents.
Correct answer: C. Both options A and B are correct
- A. Silicon carbide
- B. Diamond
- C. Both options A and B are correct
- D. None of these options are correct
Explanation
a) Silicon Carbide (SiC): Silicon carbide is a covalent crystal with a giant molecular structure. It consists of a three-dimensional network of covalently bonded atoms. Due to its strong covalent bonds, silicon carbide is insoluble in all solvents. b) Diamond: A diamond is also a covalent crystal with a giant molecular structure. It is composed of carbon atoms arranged in a tetrahedral lattice through strong covalent bonds. Like silicon carbide, diamond is insoluble in all solvents due to its robust covalent bonding. Therefore, both silicon carbide and diamond, being covalent crystals with giant molecular structures, are insoluble in all solvents, making option c) the correct answer.
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About Crystalline Solids
Crystalline solids contain particles arranged in a regular repeating lattice described by a unit cell. Their study includes coordination number, packing efficiency, density, anisotropy, cleavage, polymorphism and common crystal systems, along with ionic, molecular, covalent network and metallic crystals. Crystalline order differs from the random arrangement of amorphous solids.
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