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CsCl crystallises in body centred cubic lattice. If 'a' is its edge length then which of the following expressions is correct ?

$\begin{array}{1 1}(A)\;r_{Cs^+}+r_{Cl^-}=\large\frac{\sqrt 3}{2}\normalsize a\\(B)\;r_{Cs}+r_{Cl^-}=\sqrt 3a\\(C)\;r_{Cs}+r_{Cl^-}=3a\\(D)\;r_{Cs^+}+r_{Cl^-}=\large\frac{\ 3a}{2}\end{array} $

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1 Answer

$r_{Cs^+}+r_{Cl^-}=\large\frac{\sqrt 3}{2}\normalsize a$
Hence (A) is the correct answer.
answered Apr 7, 2014 by sreemathi.v
 
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