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Identify the correct statement from the following.

(1) Lithium chloride is deliquescent and crystallises as a hydrate, LiCI·H2O.

(2) The order of hydration enthalpies of alkaline earth cations

Be2+ < Mg2+ < Ca2+ < Sr2+ < Ba2+

(3) Lithium and Magnesium show some similarities in their physical properties as they are diagonally placed in periodic table.

(4) Lithium is softer among all alkali metals.

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