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JEE Advanced 2024Paper 2
Exam
JEE Advanced
Year
2024
Paper
Paper 2
Subject
Chemistry
Chapter
d and f Block Elements

JEE Advanced 2024 · Paper 2 · Chemistry · d and f Block Elements

Paragraph: When potassium iodide is added to an aqueous solution of...

Paragraph: When potassium iodide is added to an aqueous solution of potassium ferricyanide, a reversible reaction is observed in which a complex (\mathrm{P}) is formed. In a strong acidic medium, the equilibrium shifts completely towards (\mathrm{P}). Addition of zinc chloride to (\mathrm{P}) in a slightly acidic medium results in a sparingly soluble complex Q. Question: The number of moles of potassium iodide required to produce two moles of P\mathbf{P} is

Correct answer

2

Step-by-step solution

KI+K3[Fe(CN)6]⇌K4[Fe(CN)6]+12\mathrm{KI}+\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right] \rightleftharpoons \mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]+\frac{1}{2}\mathrm{I}2_2 Moles of KI\mathrm{KI} required =2=2
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