Q. Assertion : is predominantly a covalent compound.
Reason : Electronegativity difference between and is too small.

 2706  246 AIIMSAIIMS 2019Chemical Bonding and Molecular Structure Report Error

Solution:

is covalent due to high polarising power of . According to Fajan 's rule, the smaller the size of cation and the larger the size of anion, greater is the polarising power and hence greater is the covalent character.