The density of `KBr` is `2.75 gm//c c` length of the unit cell is `654pm` ( atomic masses of `K=38,Br=80)` then what is true about the predicted nature of the solid

Options

A. Solid has F.C.C structure with co`-` ordination number `=6`
B. Solid has simple cubic structure with co`-` ordination number `=4`
C. Solid has F.C.C. structure with co`-` ordination numbers `-1`
D. None of these

Answer

1

Explanation

`2.75=(Zxx118)/((6.54xx10^(-8))^(2)xx6.023xx10^(23))" "rArr" "Z=4(` foc with NaCl type structure`)`