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AIIMS2015ChemistrySolid State

The yellow colour in NaCl crystals is due to

Options

  1. Aexcitation of electrons in F-centres
  2. Breflection of light from Cl ⁻ ions on the surface
  3. Crefraction of light from Na ⁺ ions
  4. Dall of the above.

Correct answer

A. excitation of electrons in F-centres

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