The correct statement in the following isA. The ionic crstal of AgBr has Schottky defectB. The unit cell having crystal parameters, `a=b nec,alpha=beta=90^(@),gamma=120^(@)` is hexagonalC. In ionic compounds having Frenkel defect the ratio `(gamma_(+))/(gamma_(-))` is highD. The coordination number of `Na^(+)` ion in NACl is 4.

The correct statement in the following isA. The ionic crstal of AgBr h

1.	The correct statement in the following isA. The ionic crstal of AgBr has Schottky defectB. The unit cell having crystal parameters, `a=b nec,alpha=beta=90^(@),gamma=120^(@)` is hexagonalC. In ionic compounds having Frenkel defect the ratio `(gamma_(+))/(gamma_(-))` is highD. The coordination number of `Na^(+)` ion in NACl is 4.
Answer» Correct Answer - B A crystal system is hexagonal if its unit cell having `a=bnec` axial ratio and `alpha=beta=90^(@),gamma=120^(@)` axial angles.

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