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Question

Which of the following represents the incorrect order of the properties indicated?

A
Ni2+>Cr2+>Fe2+>Mn2+ (size)
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B
Sc>Ti>Cr>Mn (size)
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C
Ni2+<Co2+<Fe2+<Mn2+ (unpaired electron)
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D
H3AsO4>H3PO4 (acidic strength order)
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