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Assertion(A) : Ferrous ion has more electronegativity than ferric ion.
Reason (R) : An atom with higher oxidation state has more effective nuclear charge.

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Both A and R are correct and R is the correct explanation of A.

Both A and R are correct but R is not the correct explanation of A.

A is correct and R is incorrect.

A is incorrect and R is correct.

answer is D.

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Detailed Solution

The ion with greater amount of positive charge or oxidation state that has more effective nuclear charge. Due to this reason effective nuclear charge increases. ${E.N of Fe}^{+3} > {E.N of Fe}^{+2}$

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