Assertion :Prussian blue has multiple oxidation states of iron. Reason: Prussian blue is strongly colored and tends towards black and dark blue when mixed into oil paints.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Prussian blue is a mixed valence pigment having $K F e [F e (C N)_{6}] . x H_{2} O$ formula { $F e (I I)$ and $F e (I I I)$ } . When it is mixed with paints it undergoes oxidation and reduction due to which it changes to black and dark blue colour.

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