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Question

The correct statement in the following is

[MP PET 1997]


A

The ionic crystal of AgBr has Schottky defect

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B

The unit cell having crystal parameters, a=bc, α=β=90°, γ=120°

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C

In ionic compounds having Frenkel defect the ratiois high

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D

The coordination number of Na+ ion in NaCl is 4

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Solution

The correct option is B

The unit cell having crystal parameters, a=bc, α=β=90°, γ=120°


A crystal system is hexagonal if its unit cell having a=bcaxial ratio and α=β=90°, γ=120° axial angles


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