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'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 ____. (1) 4 (2) 3 (3) 2 (4) 5

1. 4
2. 3
3. 2
4. 5

Correct answer: 5

Solution

The correct option is 5 because there are four acidic oxides (CrO3, V2O5, and Mn2O7) among the given compounds, and cobalt in the complex has a primary valency of 1, resulting in a total of 5 when added together.

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