Question:

The tetrahedral voids formed by ccp arrangement of $Cl^{-}$ ions in rock salt structure are

Updated On: Jul 7, 2022
  • All occupied by $Na^{+}$ ions
  • 50% occupied by $Na^{+}$ ions
  • Occupied by either $Na^{+}$ nor $Cl^{-}$ ions
  • Vacant
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The Correct Option is D

Solution and Explanation

Tetrahedral voids are vacant. All the octahedral voids are occupied by $Na^{+}$ ions.
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Top Questions on Imperfections in Solids

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Concepts Used:

Imperfections in Solids

Any irregularity in the pattern of crystal arrangement in a solid lattice is called imperfection in solids. The occurrence of defects takes place when crystallization (the process of formation of crystals) occurs at a very fast or at an intermediate rate.

Basically, defects fall out in two forms:

  • Point Defect

When the irregularities exist from the ideal arrangement around a point or an atom in solids, the defect is known as a point defect. Types of point defects are:

  • Stoichiometric defects
  • Non-stoichiometric defects
  • Impurity defects
  • Line Defect

When the deviation from the ideal arrangement exists in the entire row of lattice points, the defect is called line defect.