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  • Identify the correct statement from the following.  Option: 1 Lithium and Magnesium show some similarities in their physical properties a

Identify the correct statement from the following.
 

Option: 1

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


Option: 2

Lithium is softer among all alkali metals.


Option: 3

Lithium chloride is deliquescent and crystallises as a hydrate, LiCl.H_{2}O.


Option: 4

The order of hydration enthalpies of alkaline earth cations

Be^{2+}<Mg^{2+}<Ca^{2+}<Sr^{2+}<Ba^{2+}


Answers (1)

best_answer

The softness of Alkali metals decreases down the group as the strength of the metallic bond decreases down the group. 

LiCl crystallizes as a hydrate LiCl.2H_{2}O but it is deliquescent. 

Hydration enthalpy decreases down the group as the size of the cations increases down group and charge to size ratio decreases down the group. 

Li\ and\ Mg are diagonally present to each other and lithium shows many resemblances to magnesium, which is due to the similar atomic radii of the two. 

Hence, the correct answer is option 1.

 

Posted by

Gautam harsolia

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