1.

The CORRECT statement in the following is, ....... (A) the ionic crystal of AgBr has Schottky defect (B) the unit cell having crystal parameters, a = b \(\neq\) c, \(\alpha\) = \(\beta\) = 90\(^\circ\) and \(\gamma\) = 120\(^\circ\) is hexagonal (C) in ionic compounds having Frenkel defect, the ratio \(\cfrac{\gamma_+}{\gamma_-}\) is high (D) the coordination number of Na+ ion in NaCl is 4

Answer»

Correct answer is: (B) the unit cell having crystal parameters, a = b \(\neq\) c, \(\alpha\) = \(\beta\) = 90\(^\circ\) and \(\gamma\) = 120\(^\circ\) is hexagonal



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