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JEE Mains · Chemistry · STD 12 - 5. Co-ordination chemistry
Which of the following is diamagnetic ?
- A \({[Fe{(CN)_6}]^{3 - }}\)
- B \({[Co{(C_2O_4)_3}]^{3 - }}\)
- C \([FeF_6]^{3-}\)
- D \([CoF_6]^{3-}\)
Answer & Solution
Correct Answer
(B) \({[Co{(C_2O_4)_3}]^{3 - }}\)
Step-by-step Solution
Detailed explanation
\([Fe(CN)_6]^{3-}\) has magnetic moment of a single unpaired electron whereas \([FeF_6]^{3-}\) has a magnetic moment of five unpaired electrons. \([CoF_6]^{3-}\) is paramagnetic with four unpaired electrons while \([Co(C_2O_4)_3]^3\) is diamagnetic. This anomaly is explained by…
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