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Select the correct statement(s):
(a) Co-ordination no. of \( \mathrm{Cs}^{+} \)and \( \mathrm{Cl}^{-} \)are 8,8 in \( \mathrm{CsCl} \) crystal
(b) If radius ratio \( \left(\mathrm{r}_{\mathrm{c}} / \mathrm{r}_{\mathrm{a}}\right)0.225 \), then shape of compound must be linear.
(c) If radius ratio \( \left(\mathrm{r}_{\mathrm{c}} / \mathrm{r}_{\mathrm{a}}\right) \) lie between 0.414 to 0.732 , then shape of ionic compound may be square planar (Ex. \( \left.\mathrm{PtCl}_{4}^{2-}\right) \)
(d) If radius ratio is less than 0.155 , then shape of compound is linear.
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