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MHT CET2008PhysicsSemiconductors

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

Options

  1. Aionic
  2. Bcovalent
  3. Cmetallic
  4. Dmolecular

Correct answer

C. metallic

Step-by-step solution

Metals reflect incident light by the vibrations of free electrons under the influence of electric field of incident wave. The conductivity of metals decreases with increase of temperature due to increases in random motion of free electrons. The bonding is therefore metallic.

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