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a
Co-ordination no. of Cs+ and Cl- are 8, 8 in CsCl crystal
b
If radius ratio rc/ra<0.225then shape of compound must be linear
c
If radius ratio rc/ralies between 0.414 to 0.732 then shape of ionic compound may square planar Ex.PtCl42−
d
If radius ratio is less than 0.155 then shape of compound is linear
answer is A.
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Detailed Solution
.CsCl has a body-centered cubic structure in which Cl− form simple cubic unit cell and Cs+ ion will be present at the body-centered void.In BCC void the radius ratio has range 0.732 to 0.999∴ limiting radius ratio =0.732