MHT CET · Chemistry · d and f Block Elements
Identify the compound formed from elements \(\mathrm{X}, \mathrm{Y}, \mathrm{Z}\) having oxidation state \(+2,+5,-2\) respectively.
- A \(\mathrm{X}\left(\mathrm{Y}_4 \mathrm{Z}\right)\)
- B \(\mathrm{X}_3\left(\mathrm{YZ}_4\right)_2\)
- C \(\mathrm{X}_3\left(\mathrm{YZ}_2\right)_2\)
- D \(\mathrm{XYZ}_2\)
Answer & Solution
Correct Answer
(B) \(\mathrm{X}_3\left(\mathrm{YZ}_4\right)_2\)
Step-by-step Solution
Detailed explanation
\(\mathrm{X}^{+2} \mathrm{Y}^{+5} \mathrm{Z}^{-2}\)
Overall charge on compound formed by elements X. Y and \(\mathrm{Z}\) should be zero.
\(
\begin{aligned}
& \mathrm{X}_3\left(\mathrm{YZ}_4\right)_2 \Rightarrow 3 \times 2+2 \times 5+8 \times(-2)=0 \\
& \mathrm{X}\left(\mathrm{Y}_4 \mathrm{Z}\right) \Rightarrow 1 \times 2+4 \times 5+1 \times(-2) \neq 0 \\
& \mathrm{X}_3\left(\mathrm{YZ}_2\right)_2 \Rightarrow 3 \times 2+2 \times 5+4 \times(-2) \neq 0 \\
& \mathrm{XYZ}_2 \Rightarrow 1 \times 2+1 \times 5+2 \times(-2) \neq 0
\end{aligned}
\)
Overall charge on compound formed by elements X. Y and \(\mathrm{Z}\) should be zero.
\(
\begin{aligned}
& \mathrm{X}_3\left(\mathrm{YZ}_4\right)_2 \Rightarrow 3 \times 2+2 \times 5+8 \times(-2)=0 \\
& \mathrm{X}\left(\mathrm{Y}_4 \mathrm{Z}\right) \Rightarrow 1 \times 2+4 \times 5+1 \times(-2) \neq 0 \\
& \mathrm{X}_3\left(\mathrm{YZ}_2\right)_2 \Rightarrow 3 \times 2+2 \times 5+4 \times(-2) \neq 0 \\
& \mathrm{XYZ}_2 \Rightarrow 1 \times 2+1 \times 5+2 \times(-2) \neq 0
\end{aligned}
\)
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