Question

Which of the following statement is correct.............
a) FeCl2 is more covalent than FeCl3.
b) FeCl3 is more covalent than FeCl2.
c) Both FeCl2&FeCl3 are equally covalent.
d) FeCl2 & FeCl3 do not have any covalent character.​

Answer 1

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b) FeCl3 is more covalent than FeCl2.

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Answer 2

In the given statement option (B) is correct.

• according to Fajans' law, Fe3+ will have bigger polarising strength than Fe2+ and hence FeCl3 will be besides covalent than FeCl2.
• Fajan's rule is expressed established on the theory of polarization which expresses that the covalent character of an anion increases with a rise in its polarization. The two major components that influence the breadth of polarization of an anion are the polarizing power of the cation and the polarizability of the anion.