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Solid State Chemistry - Point Defects and Interstitial Compounds

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Multiple Choice

The anionic sites occupied by unpaired electrons are called F-centers or colour centers. They impart ______ $(X)$ colour to the crystals on $NaCl.$ Excess of lithium makes $LiCl$ crystals ______ $(Y)$ and excess of potassium makes $KCl$ crystals ______ $(Z)$. $(X)$, $(Y)$ and $(Z)$ are:

  1. yellow, green and pink respectively.
  2. pink, yellow and violet (or lilac) respectively.
  3. yellow, pink and violet (or lilac) respectively.
  4. red, yellow and pink respectively,
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