Which from the following metal chlorides does not contain water of crystallisation ?

Step-by-step solution

Alkali metal chlorides generally do not form hydrates, with the exception of lithium chloride, which is deliquescent and crystallises as a dihydrate, LiCl 2 H ₂ O . Alkaline earth metal chlorides such as MgCl ₂ and BeCl ₂ readily form hydrates. MgCl ₂ crystallises as a hexahydrate, MgCl ₂ 6 H ₂ O , and BeCl ₂ crystallises as a tetrahydrate, BeCl ₂ 4 H ₂ O . Caesium chloride ( CsCl ) is an alkali metal chloride that does not form hydrates and crystallises as an anhydrous salt. Therefore, CsCl does not contain water