Class 12th Chemistry 2017 Set1 Delhi Board Paper Solution

Question 25

Give reasons:

In stoichiometric defects, NaCl exhibits Schottky defect and not Frenkel defect.

 

Answer

In NaCl, the cation (Na + ) and anion (Cl− ) are of almost similar sizes. The defect shown by these cations and anions is Schottky defect. Whereas Frenkel defect is generally found in ionic crystals where anion is much larger in size then that the cation.

 

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