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(i) The most stable oxidation state is Fe 3+ (ii) Most oxidising state is Fe 2+ .

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31.

Which element shows the highest oxidation state among the d-block elements?

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32. What is the reason of transition elements to exhibit variable oxidation states?

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33. Out of V and Mn which exhibits more oxidation states?

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34.

What is the most stable oxidation state of Mn (Z = 25)?

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35. Write the highest oxidation state shown by element with atomic number 23.

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36.

The electronic configuration of an element is 3d⁵ 4s¹. Write its (i) most stable oxidation state and (ii) most oxidising state.

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(i) The most stable oxidation state is Fe³⁺
(ii) Most oxidising state is Fe²⁺.

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38. What is the highest oxidation state shown by Cr (Z = 24)?

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39. Why are Cr²⁺ reducing and Mn³⁺ oxidising when both have d⁴ configurations?

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40. The E° value of Zn²⁺/Zn and Mn²⁺/Mn are quite low. Why?

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