1.

If Agl crystallises in zinc blende structure with I^(-) ions at lattice points. What fraction of tetrahedral voids is occupied by Ag^(+) ions

Answer»

0.25
0.5
1
0.75

Solution :In Agl crystal, number of `Ag^(+)` ions is equal to `I^(-)` ions. However, the number of tetrahedral VOIDS are twice the number of ATOMS FORMING the cubic lattice.
`therefore` Number of tetrahedral voids occupied by `Ag^(+)` ion =50%


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