1.

CsBr crystal has bcc structure . It has an edge length of 4.3 overset(@)A. The shortest interionic distance between Cs^(+) and Br^(-) ions is

Answer»

`1.86 OVERSET(@)A`
`3.72 overset(@)A`
`4.3 overset(@)A`
`7.44 overset(@)A`

SOLUTION :Closest approach in bcc lattice
`=(1)/(2)` of body diagonal `=(1)/(2)xxsqrt(3)a =SQRT(3)/(2)xx4.3=3.72overset(@)A`.


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