Paragraph: The reaction of K _ 3 [ Fe ( CN )_ 6 ] with freshly prepared FeSO _ 4 solution produces a dark blue precipitate called Turnbull's blue. Reaction of K _ 4 [ Fe ( CN )_ 6 ] with the FeSO _ 4 solution in complete absence of air produces a white precipitate X , which turns blue in air. Mixing

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Paragraph: The reaction of K _ 3 [ Fe ( CN )_ 6 ] with freshly prepared FeSO _ 4 solution produces a dark blue precipitate called Turnbull's blue. Reaction of K _ 4 [ Fe ( CN )_ 6 ] with the FeSO _ 4 solution in complete absence of air produces a white precipitate X , which turns blue in air. Mixing the FeSO _ 4 solution with NaNO _ 3 , followed by a slow addition of concentrated H _ 2 SO _ 4 through the side of the test tube produces a brown ring. Question: Precipitate X is

Quantrex Academy · Accepted Answer

Correct answer: C. K 2 Fe Fe CN 6

JEE Advanced Chemistry Question (2021) — Solution

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