The correct order of number of unpaired electrons in the ions Cu2+,Ni2+, Fe3+ and Cr3+ is:
Correct answer: D. Fe3+>Cr3+> Ni2+>Cu2+
- A. Cu2+>Ni2+>Cr3+>Fe3+
- B. Fe3+>Cr3+>Cu2+>Ni2+
- C. Ni2+>Cu2+>Fe3+> Cr3+
- D. Fe3+>Cr3+> Ni2+>Cu2+
Explanation
Fe+3=5 unpaired electrons Cr+3=3 unpaired electrons Ni+2=2 unpaired electrons Cu+2=2 unpaired electrons So the order of number of unpaired electrons=Fe+3>Cr+3>Ni+2>Cu+2
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