The lusture of a metal is due to

Options

(a) its chemical inertness
(b) its high polishing
(c) its high density
(d) presence of free electrons

Correct Answer:

presence of free electrons

Explanation:

The metals lusture is due to presence of mobile electrons in the metals crystals. Under the influence of light, the surface electrons absorb the proton of visible light and then re-emit the absorbed radiation. Therefore the surface of metal shows a shinning appearance.