Question:
Which of the following elements exhibits only one value of oxidation state?
Which of the following elements exhibits only one value of oxidation state?
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Zinc has a completely filled d subshell and loses only its two 4s electrons.
Updated On: Nov 12, 2026
- \(\text{Mn}\)
- \(\text{Fe}\)
- \(\text{Zn}\)
- \(\text{W}\)
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
Variable oxidation states in transition metals come from the small energy gap between ns and (n-1)d electrons.
Step 2: Look at each element
Mn shows \(+2\) to \(+7\), Fe shows \(+2\) and \(+3\), and W shows several states.
Zn has configuration \(3d^{10}4s^{2}\).
Step 3: Conclusion
Zn loses only the \(4s^{2}\) electrons, since the stable \(3d^{10}\) shell is not disturbed. It shows only \(+2\).
Final Answer:
Zinc exhibits only the +2 oxidation state. \[ \boxed{\text{(C) }\text{Zn}} \]
Variable oxidation states in transition metals come from the small energy gap between ns and (n-1)d electrons.
Step 2: Look at each element
Mn shows \(+2\) to \(+7\), Fe shows \(+2\) and \(+3\), and W shows several states.
Zn has configuration \(3d^{10}4s^{2}\).
Step 3: Conclusion
Zn loses only the \(4s^{2}\) electrons, since the stable \(3d^{10}\) shell is not disturbed. It shows only \(+2\).
Final Answer:
Zinc exhibits only the +2 oxidation state. \[ \boxed{\text{(C) }\text{Zn}} \]
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