Question

melting poun of Nacl is higher then that of AlCl3 explain​

Answer 1

Hii dear here is your answer

Let us answer from point of chemical properties of ionic and covalent compounds.
we know that ionic compounds have more melting and boiling points than covalent compounds.
compare NaCl , AlCl3 .
NaCl is more ionic than AlCl3 because ionic character depends on size of cations as here anions are same more the size more the ionic character.
Na+ has more size than Al+++.
so the melting point of Nacl is much higher than that of Alcl3

Answer 2

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It is Beacuse NaCl is more ionic than AlCl3. As the size if Na+ ion is more than Al+++ ion.

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