Same chapter3 marksDifficulty: Medium
How many atoms are there in a face-centred cubic unit cell?
Solid State
3 marksDifficulty: Medium
Distinguish between crystalline and amorphous solids, giving one example of each.
Original Khojo Papers practice question — not from a past board paper.
Answer
A crystalline solid has a long-range ordered arrangement of particles, a sharp melting point and is anisotropic; sodium chloride is an example. An amorphous solid has only short-range order, softens over a range of temperature and is isotropic; glass is an example.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Amorphous solids are sometimes called supercooled liquids because they have no true melting point.
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