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QJEEM24Ch34a4: JEE Main 2024 Chemistry - Class 12 JEEM24Ch34a4 Solution: Which one of the following complexes will exhibit the least…

Which one of the following complexes will exhibit the least paramagnetic behaviour ? [Atomic number, Cr=24,Mn=25,Fe=26,Co=27\mathrm{Cr}=24, \mathrm{Mn}=25, \mathrm{Fe}=26, \mathrm{Co}=27 ]

Multiple Choice Options

  • A [Fe(H2O)6]2+\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}
  • B [Mn(H2O)6]2+\left[\mathrm{Mn}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}
  • C [Co(H2O)6]2+\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}
  • D [Cr(H2O)6]2+\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}

Step-by-Step Verified Solution

JEE Main 2024 (Online) 5th April Morning Shift Chemistry - Coordination Compounds Question 29 English Explanation

So, the complex with minimum number of unpaired e⊖\mathrm{e}^{\ominus} is option (2) [Co(H2O)6]2+\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+} .

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