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Characteristics of s- Block Elements

Which one of ...

Question

Which one of them is having higher melting point and why?
$A l C l$ , $M g {C l}_{2}$

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Solution

Electrovalent compounds have higher melting point in comparision of covalent compounds. Hence electrovalent $M g C l_{2}$ have higher boiling point than a covalent $A l C l_{3}$ .

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