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Chemistry · 2018
JEE Main 2018 · 2018-04-08 Offline · Q46
Hydrogen peroxide oxidises [ Fe ( CN )_6]^4- to [ Fe ( CN )_6]^3- in acidic medium but reduces [ Fe ( CN )_6]^3- to [ Fe ( CN )_6]^4- in alkaline…
Hydrogen peroxide oxidises $\displaystyle \left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}$ to $\displaystyle \left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$ in acidic medium but reduces $\displaystyle \left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$ to $\displaystyle \left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}$ in alkaline medium. The other products formed are, respectively :
Official answer
(3)
$\displaystyle \mathrm{H}_2 \mathrm{O} \text { and }\left(\mathrm{H}_2 \mathrm{O}+\mathrm{O}_2\right)$
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JEE Main 2018 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.