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Question

Which of the following metals does not exhibit variable oxidation state?

A
Cu
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B
Sc
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C
V
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D
Cr
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Solution

The correct option is B Sc
Sc doesn't show variable oxidation state. It only exhibit +3 oxidation state.
Cu can show +1, +2 oxidation state.
V can show +2, +3, +4, +5 oxidation state.
Cr can show +2, +3, +4, +5, +6 oxidation state.

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