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NEET 2011
Exam
NEET
Year
2011
Subject
Chemistry
Chapter
Coordination Compounds

NEET 2011 · Chemistry · Coordination Compounds

The d-electron configurations of Cr^ 2+ , Mn^ 2+ , Fe^ 2+ and Co^...

The d-electron configurations of Cr2+,Mn2+\mathrm{Cr}^{2+}, \mathrm{Mn}^{2+}, Fe2+\mathrm{Fe}^{2+} and Co2+\mathrm{Co}^{2+} are d4,d5,d6d^4, d^5, d^6 and d7d^7 respectively. Which one of the following will exhibit minimum paramagnetic behaviour? (At. no. Cr=24,Mn=25,Fe=26,Co=27\mathrm{Cr}=24, \mathrm{Mn}=25, \mathrm{Fe}=26, \mathrm{Co}=27 )

Options

  1. A\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}
  2. B[Co(H2O6]2+\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}_6\right]^{2+}\right.
  3. C\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}
  4. D\left[\mathrm{Mn}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}

Correct answer

B. [Co(H2O6]2+\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}_6\right]^{2+}\right.

Step-by-step solution

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