The following salt shows maximum covalent character
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a
AlCl3
b
MgCl2
c
CsCl
d
LaCl3
answer is A.
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Detailed Solution
According to Fajan’s rule, as the charge on cation increase its size decreases. As a result its tendency to polarise anion increases. This brings more and more covalent character to electrovalent compounds.∵ Among AlCl3,LaCl3,MgCl2 and CsCl size of Al3+ is smallest.∴ Al3+ polarises anion to highest extent.∴ AlCl3 has maximum covalent character.