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Q. In chemical reaction of potassium ferrocyanide and hydrogen peroxide in the presence of dil. $H_{2}SO_{4}$

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Solution:

In reaction of potassium ferrocyanide and hydrogen peroxide in the presence of dil. $H_{2}SO_{4}$
$\left[\right.Fe\left(\right.CN\left(\left.\right)_{6}\left(\left]\right.\right)^{4 -}$ is oxidised by $H_{2}O_{2}$ into $\left[\right.Fe\left(\right.CN\left(\left.\right)_{6}\left(\left]\right.\right)^{3 -}$ ions.
$2\left(\text{K}\right)_{4}\text{[Fe}\left(\right. \text{CN} \left.\right)_{6}\left]\right.+\left(\text{H}\right)_{2}\left(\text{O}\right)_{2} \rightarrow 2\left(\text{K}\right)_{3}\text{[Fe}\left(\right. \text{CN} \left.\right)_{6}\left]\right.+2\text{KOH}$

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