Q.
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a
A NaCl type is f.c.c. unit cells with corners and faces occupied by either cation or anion
b
In a face-centred cubic unit cell, the body centre is an octahedral void
c
In f. c. c. unit cell, octahedral and tetrahedral voids are equal
d
Tetrahedral voids = 2 × octahedral voids, is true for only c. c. p and h. c. p.
answer is A.
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