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(C) Metals reflect incident light due to the oscillations of free electrons under the influence of the electric field of the incident light wave.As th

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Metallic

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(C) Metals reflect incident light due to the oscillations of free electrons under the influence of the electric field of the incident light wave.As the temperature increases,the random motion of free electrons increases,which leads to more frequent collisions with the lattice ions.This increase in collisions results in an increase in electrical resistance,and consequently,the electrical conductivity of the metal decreases.Therefore,the bonding in such a solid is metallic.

$A$ solid reflects incident light and its electrical conductivity decreases with temperature. The binding in this solid is:

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