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Q.

The most stable oxidation state of Iron is

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a

+ III

b

+ II

c

+ VI

d

+ I

answer is B.

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Detailed Solution

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The stable oxidation state of iron is +3 state because in this state, 4s orbital is empty and 3d orbital is half-filled which is more stable as compared to other oxidation states.
Fe+3 - 4s03d5

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