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Q.

Metallic lustre is explained by


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a

Oscillation of loose electrons

b

Diffusion of metal ions

c

Excitation of free protons

d

Existence of BCC lattice 

answer is A.

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Detailed Solution

●        The metallic lustre of a metal is due to the oscillation of loosely bound electrons.
●        When light falls on the electrons, they absorb energy and are set into oscillations, and they emit radiations which are responsible for the metallic lustre.
 
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