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  4. In chemical reaction of potassium ferrocyanide and hydrogen peroxide in the presence of dil. H2SO4

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

NTA AbhyasNTA Abhyas 2020The d-and f-Block Elements

Solution:

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

$\left[ Fe ( CN )_{6}\right]^{4-}$ is oxidised by $H _{2} O _{2}$ into $\left[ Fe ( CN )_{6}\right]^{3-}$ ions. $2 K _{4}\left[ Fe ( CN )_{6}\right]+ H _{2} O _{2} \rightarrow 2 K _{3}\left[ Fe ( CN )_{6}\right]+2 KOH$