An octahedral complex with the formula CoCl 3 nNH 3 upon reaction with excess of AgNO 3 solution given 2 moles of AgCl . Consider the oxidation state of Co in the complex is ' x '. The value of " x+n " is

Chemistry · Coordination Compounds

JEE Main 2024 — 8 April, Shift 1 — Question 65

An octahedral complex with the formula $\mathrm{CoCl}_{3} \mathrm{nNH}_{3}$ upon reaction with excess of $\mathrm{AgNO}_{3}$ solution given 2 moles of AgCl . Consider the oxidation state of Co in the complex is ' $x$ '. The value of " $x+n$ " is $\qquad$

Option A:
3
Option B:
6
Option C:
8
Correct
Option D:
5

Answer: C

Step-by-step solution

$\left[\stackrel{+3}{\mathrm{Co}}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Cl}\right] \mathrm{Cl}_{2}+$ excess $\mathrm{AgNO}_{3} \longrightarrow 2 \mathrm{AgCl}$

( 2 moles)

$\mathrm{x}+0-1-2=0$

$\mathrm{x}=+3$

$\mathrm{n}=5$

$\therefore \mathrm{x}+\mathrm{n}=8$

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Exam: JEE Main 2024
Paper: 8 April, Shift 1
Subject: Chemistry
Chapter: Coordination Compounds
Topic: Properties and importance of Coordination Complexes

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Step-by-step solution

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