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  • Arrange the following metal ions in the order of increasing pairing energy: <img alt="\mathrm{Fe^{2+}, Ni^{2+}, Fe^{3+}, Co^{2+}.}" src="/latex-image/?%5Cmathrm%7BFe%5E%7B2&plus;%7D%2C%20Ni%5E%

Arrange the following metal ions in the order of increasing pairing energy: \mathrm{Fe^{2+}, Ni^{2+}, Fe^{3+}, Co^{2+}.}

Option: 1

\mathrm{Fe^{3+}< Fe^{2+}< Co^{2+}< Ni^{2+}}
 


Option: 2

\mathrm{Fe^{2+}< Ni^{2+}<Co^{2+}< Fe^{3+}}

 

 


Option: 3

\mathrm{Fe^{2+}< Fe^{3+}< Ni^{2+}< Co^{2+}}


Option: 4

\mathrm{Ni^{2+}<Co^{2+}< Fe^{2+}< Fe^{3+}}


Answers (1)

best_answer

Pairing energy is proportional to number of paired electrons, So, the number of paired electrons in \mathrm{Fe^{3+}, Fe^{2+}, Co^{2+} and\: Ni^{2+}} are 0, 1, 2 and 3. So pairing energy increases. 

 

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Sayak

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