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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 \( \left(r_{c} / r_{a}\right)0.225 \) then shape of compound must be linear
(c) If radius ratio \( \left(r_{c} / r_{a}\right) \) lies between \( 0.414 \) to \( 0.732 \) then shape of ionic compound may be square planer (Ex. \( \mathrm{PtCl}_{4}^{2-} \) )
(d) If radius ratio is less than \( 0.155 \) then shape of compound is linear
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