JEE Main 2025 — Coordination Compounds Question with Solution
From: JEE Main 2025 (Online) 7th April Evening Shift
Question
'X' is the number of acidic oxides among VO2, V2O3, CrO3, V2O5 and Mn2O7. The primary valency of cobalt in
[Co(H2NCH2CH2NH2)3]2(SO4)3 is Y. The value of X + Y is _________.
Choose an option
Show full solutionCorrect option: D
5
Step-by-step explanation
In the given compounds, we evaluate which are acidic oxides:
CrO3 is acidic.
Mn2O7 is acidic.
Therefore, the number of acidic oxides, , is 2.
Next, for the complex , we consider its dissociation:
The primary valency of cobalt (Y) in this context is 3.
Thus, the value of is:
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