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Q. Lowest melting point chloride, among following is:

The s-Block Elements

Solution:

Alkali metal halides have high melting point. The melting point of alkali metal chloride decrease from $NaCl$ to $CsCl$ (except $Li$ ), due to covalent character of $LiCl$.

LiCl NaCl KCl RbCl CsCl
833K 1081K 1043K 990K 918K


$NaCl$ has the highest melting point and $LiCl$ has the lowest melting point.