Statement 1: CsCl has body-centred cubic arrangement.Statement 2: CsCl has one Cs+ ion and 8 Cl- ions in its unit cell.

CsCl follows 8 : 8 type of arrangement.That means, Co.No. of Cs+ ion = 8; and Cs+ion present in cubic voids or body centre Co.No. of Cl-ion = 8; and ions follows simple cubic arrangement. They  occupy corners of the cube.Number of Cs+ions per unit cell = 1×1 =1 Number of Cl- ions per unit cell =8×18=1Therefore, CsCl has one Cs+ ion and one Cl- ion in its unit cell.