A) The radius \[{{r}^{+}}/{{r}^{-}}\] increases as coordination number increases.
B) As the difference in size of ions increases, coordination number increases.
C) When coordination number is eight, the \[{{r}^{+}}/{{r}^{-}}\] ratio lie between\[0.155-0.225\].
D) In ionic solid of the type AX (ZnS, Wurtzite) the coordination number of \[Z{{n}^{2+}}\,and\,\,{{S}^{2-}}\] respectively are 4 and 4.
Correct Answer: C
Solution :
When coordination number is eight, the radius \[\left( \frac{{{r}^{+}}}{{{r}^{-}}} \right)\] ratio M lies between 0.732 to 1.000.
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