X ' is the number of acidic oxides among VO 2 , V 2 O 3 , CrO 3 , V 2 O 5 and Mn 2 O 7 . The primary valency of cobalt in [ Co ( H 2 NCH 2 CH 2 NH 2 ) 3 ] 2 ( SO 4 ) 3 is Y . The value of X+Y is \ \ \ \ \ .

Chemistry · Coordination Compounds

JEE Main 2025 — 7 April, Evening Shift — Question 13

$X$ ' is the number of acidic oxides among $\mathrm{VO}_{2}, \mathrm{~V}_{2} \mathrm{O}_{3}$ , $\mathrm{CrO}_{3}, \mathrm{~V}_{2} \mathrm{O}_{5}$ and $\mathrm{Mn}_{2} \mathrm{O}_{7}$ . The primary valency

of cobalt in $\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{NCH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}\right)_{3}\right]_{2}\left(\mathrm{SO}_{4}\right)_{3}$ is Y . The value of $X+Y$ is $\_\_\_\_\_$ .

Option A:
4
Option B:
3
Option C:
2
Option D:
5
Correct

Answer: D

Step-by-step solution

Among $\mathrm{VO}_{2}, \mathrm{~V}_{2} \mathrm{O}_{3}, \mathrm{~V}_{2} \mathrm{O}_{5}, \mathrm{CrO}_{3}$ and $\mathrm{Mn}_{2} \mathrm{O}_{7}$ , only $\mathrm{CrO}_{3} \& \mathrm{Mn}_{2} \mathrm{O}_{7}$ is acidic $\mathrm{X}=2$

Primary valency of cobalt in $\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{NCH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}\right)_{3}\right]_{2}\left(\mathrm{SO}_{4}\right)$ is 3 as cobalt have +3 charge

$Y=3$

$X+Y=5$

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Exam: JEE Main 2025
Paper: 7 April, Evening Shift
Subject: Chemistry
Chapter: Coordination Compounds
Topic: Properties and importance of Coordination Complexes

Answer: D

Step-by-step solution

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