Question

Lowest melting point chloride, among following is:

• A. LiCl
• B. NaCl
• C. KCl
• D. CsCl

Answer 1

Answer: (A)

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.