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Identify the correct statement from the following.
A
Lithium chloride is deliquescent and crystallises as a hydrate, $LiCl\cdot H_2O$.
B
The order of hydration enthalpies of alkaline earth cations $Be^{2+}<Mg^{2+}<Ca^{2+}<Sr^{2+}<Ba^{2+}$
C
Lithium and Magnesium show some similarities in their physical properties as they are diagonally placed in periodic table.
D
Lithium is softer among all alkali metals.
Detailed Solution
Lithium and magnesium, being diagonally placed in the periodic table, show a diagonal relationship and share several similarities in their chemical and physical properties, unlike other members of their respective groups.