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Question
Account for the following :
SnCl4 is more covalent than SnCl2.
Solution
According to the Fajan's rule, the central metal with more positive oxidation number, shows more polarising power. This in turn shows more covalent character. In SnCl4, Sn exists in +4 oxidation state, while in SnCl2, Sn exists in +2 oxidation state. So, SnCl4 is more covalent than SnCl2.
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