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