JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
' 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 \(\mathrm{X}+\mathrm{Y}\) is _______.
- A 5
- B 4
- C 2
- D 3
Answer & Solution
Correct Answer
(A) 5
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & \mathrm{CrO}_3=\text { Acidic } \\ & \mathrm{Mn}_2 \mathrm{O}_7=\text { Acidic } \\ & \therefore \mathrm{x}=2\end{aligned}\) \(\begin{aligned} & \therefore \text { Primary valency }=3 \\ & \therefore \mathrm{x}+\mathrm{y}=5\end{aligned}\)
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