Statement - I :Potassium ferrocyanide and potassium ferricyanide both are paramagnetic.
Statement - II :Both have unpaired electrons

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Both statements I and II are correct

Statement-I is incorrect and statement-II is correct

Both statements I and II are incorrect

Statement-I is correct and statement-II is incorrect

answer is D.

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Detailed Solution

Potassium ferrocyanide is K₄[Fe(CN)₆]. It contains Fe²⁺ ions with 3d⁶ outer electronic configuration. Since cyanide is strong field ligand, all 3d electrons will be paired. Hence, potassium ferrocyanide will be diamagnetic.
Potassium ferricyanide is K₃[Fe(CN)₆]. It contains Fe³⁺ ions with 3d⁵ outer electronic configuration. Cyanide is a strong field ligand, so spin pairing will be favored. One 3d electron will remain unpaired. Hence, potassium ferricyanide will be paramagnetic.