1.

Consider the radii 0.095 nm (Na^+), 0.181 nm (CI^-), 0.074 nm (Zn^(2+)), 0.184 nm (S^(2-)) , 0.068 nm (Ti^(4+)), 0.140 nm (O^(2-)), 0.169 nm (Cs^+) . Choose the correct option from among the following. (Use radius ratio rules)

Answer»

`Na^+`ions are packed in octahedral HOLES between the PLANES of close-packed `Cl^-` ions
`Zn^(2+)`ions are packed in tetrahedral holes
`Cs^+`ions are packed in a simple cubic ARRAY of `Cl^-` ions
All of these

Solution :Calculate the `(r^+)/(r^-)`ratio to get the limiting ratio value and CONSULT the table. All are correct.


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