The dehydration of hydrated chlorides, bromides and iodides of Ca,Sr,Ba is possible but hydrated halides of Be and Mg on heating suffer hydrolysis due to their small size or high charge density. CaCl2â‹…6H2O
∆
⟶
CaCl2
Anhydrous
+6H2O MgCl2â‹…8H2O
∆
⟶
MgO+7H2O+2HCl MgCl2 can be made anhydrous by heating in presence of dry HCl. MgCl2â‹…6H2O
∆‌ (Calcination) ‌
────────▶
‌ Dry HCl(g) ‌
MgCl2+8H2O Hence, on heating CaCl2â‹…6H2O undergoes dehydration but MgCl2â‹…8H2O does not. Metal oxides are generally basic. In alkaline earth metal BeO is amphoteric and shows anomalous behaviour while other oxides are basic. So, both statement I and statement II are false.