Question
Amongst $$LiCl,RbCl,BeC{l_2}$$ and $$MgC{l_2}$$ the
compounds with the greatest and the least ionic character, respectively are:
A.
$$LiCl\,{\text{and}}\,RbCl$$
B.
$$RbCl\,{\text{and}}\,BeC{l_2}$$
C.
$$MgC{l_2}\,{\text{and}}\,BeC{l_2}$$
D.
$$RbCl\,{\text{and}}\,MgC{l_2}$$
Answer :
$$RbCl\,{\text{and}}\,BeC{l_2}$$
Solution :
According to Fajan’s rule smaller, highly charged cation has greatest covalent character while large cation with smaller charge has greatest ionic character.