Which of the following is NOT malleable? (1) Graphite (2) Aluminium (3) Copper (4) Silver

Which of the following is NOT malleable? (1) Graphite (2) Aluminium (3) Copper (4) Silver
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(1) Graphite Explanation: Graphite is soft thanks to Van derWalls forces between to sheets of carbon atoms.
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(3) reflection of light due to the presence of free electrons Explanation: Lustre (or luster) is the way light interacts with the surface of a crystal, rock, or mineral. The word traces its origins back to the latin lux, meaning "light", and generally implies radiance, gloss, or brilliance. Metals in general have high electrical conductivity, high thermal conductivity, and high density. Typically they are malleable and ductile, deforming -under stress without cleaving.

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