JEE MAIN - Chemistry (2024 - 1st February Evening Shift - No. 9)

Given below are two statements :

Statement (I) : Dimethyl glyoxime forms a six-membered covalent chelate when treated with $\mathrm{NiCl}_2$ solution in presence of $\mathrm{NH}_4 \mathrm{OH}$.

Statement (II) : Prussian blue precipitate contains iron both in $(+2)$ and $(+3)$ oxidation states.

In the light of the above statements, choose the most appropriate answer from the options given below :

Statement I is false but Statement II is true

Both Statement I and Statement II are true

Statement I is true but Statement II is false

Both Statement I and Statement II are false

Explanation

Let's analyze each statement separately:

Statement (I): JEE Main 2024 (Online) 1st February Evening Shift Chemistry - Coordination Compounds Question 65 English Explanation

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 $\mathrm{Fe}_4\mathrm{[Fe(CN)_6]_3}$. In this formula, the iron within the square brackets, $\mathrm{[Fe(CN)_6]^{4-}}$, 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.

JEE MAIN - Chemistry (2024 - 1st February Evening Shift - No. 9)

Explanation

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