Which of the following can be separated by " Sublimation Method"?
Correct answer: B. Sand and Naphthalene
- A. Sand and Iron Filing
- B. Sand and Naphthalene
- C. Both A & B
- D. None
Explanation
A mixture of sand and naphthalene can be separated by sublimation because naphthalene changes directly into vapour on heating while sand remains solid. Iron filings and sand are separated more directly by a magnet, so choosing both ignores the specific requirement of the sublimation method.
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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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