JEE Main 2024 — Coordination Compounds Question with Solution
From: JEE Main 2024 (Online) 1st February Evening Shift
Question
Statement (I) : Dimethyl glyoxime forms a six-membered covalent chelate when treated with solution in presence of .
Statement (II) : Prussian blue precipitate contains iron both in and oxidation states.
In the light of the above statements, choose the most appropriate answer from the options given below :
Choose an option
Show full solutionCorrect option: A
Step-by-step explanation
Let's analyze each statement separately:
Statement (I): 
So, Statement I is false.
Statement (II): Prussian blue, also known as ferric ferrocyanide, is a famous pigment that contains iron in both +2 and +3 oxidation states. Its chemical formula can be represented as . In this formula, the iron within the square brackets, , is in the +2 oxidation state (ferrocyanide ion), while the iron outside the square brackets is in the +3 oxidation state (ferric ion). The compound is a complex salt that arises from the reaction of ferric and ferrous ions with cyanide ions. Therefore, Statement II is also true.
With both statements being true, the correct answer is:
Option A : Statement I is false but Statement II is true.
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This is a previous-year question from JEE Main 2024, covering the Coordination Compounds chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.