Which one of the following bonds produces a solid that reflects light… | NEET 2010 (AIPMT, Prelims)

Q1NEET 2010 · AIPMT · PRELIMSEasy

Other / Mixed

Which one of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and has high melting point?

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Answer: (a)

Metals reflect visible light because free electrons absorb and re-emit it (metallic lustre).
In metals, resistance rises with temperature because lattice vibrations scatter electrons more, so conductivity falls.
Metallic bonding is strong in most metals, so they have high melting points.
So the answer is (a) metallic bonding.

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