Which one of following is not a property of pure quartz ?
Correct answer: A. Coloured solid
- A. Coloured solid
- B. Brittle
- C. Hard
- D. All of above
Explanation
Pure quartz is colourless, hard, and brittle, so “coloured solid” is not normally a property of pure quartz; colour usually comes from impurities. “All of the above” is the likely wrong choice because hardness and brittleness are genuine properties of quartz.
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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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