The co ordination number of chloride in NaCl crystal is ____ ?
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a
2
b
6
c
4
d
8
answer is B.
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Detailed Solution
In NaCl type of crystal, anions form the FCC lattice and the cations occupy all the octahedral voids. Octahedral voids are located at the edge centre and the body centre. Six edges come out from a corner and so the co ordination number of chloride ions is 6.