Statement 1: Coordination number of CsCl changes from 8 : 8 to 6 : 6 on heating.Statement 2: The crystal structure of CsCl changes to NaCl on heating.

CsCl has B.C.C. structure at room temperature with co-ordination number 8.on heating its co-ordination number decreases and becomes 6 and thus acquires rock .salt structure.(F.C.C)