Number of complexes from the following with even number of unpaired "d" electrons is

\({\left[\mathrm{V}{\left({\mathrm{H}}_{2}\mathrm{O}\right)}_{6}\right]}^{3+},{\left[\mathrm{Cr}{\left({\mathrm{H}}_{2}\mathrm{O}\right)}_{6}\right]}^{2+},{\left[\mathrm{Fe}{\left({\mathrm{H}}_{2}\mathrm{O}\right)}_{6}\right]}^{3+},{\left[\mathrm{Ni}{\left({\mathrm{H}}_{2}\mathrm{O}\right)}_{6}\right]}^{3+},{\left[\mathrm{Cu}{\left({\mathrm{H}}_{2}\mathrm{O}\right)}_{6}\right]}^{2+}\)
[Given atomic numbers: \(\mathrm{V}=23,\mathrm{Cr}=24,\mathrm{Fe}=26,\mathrm{Ni}=28\mathrm{Cu}=29\)]

[JEE Main 2024, 04 Apr (Shift 1)]

Question

Number of complexes from the following with even number of unpaired "d" electrons is

\({\left[\mathrm{V}{\left({\mathrm{H}}_{2}\mathrm{O}\right)}_{6}\right]}^{3+},{\left[\mathrm{Cr}{\left({\mathrm{H}}_{2}\mathrm{O}\right)}_{6}\right]}^{2+},{\left[\mathrm{Fe}{\left({\mathrm{H}}_{2}\mathrm{O}\right)}_{6}\right]}^{3+},{\left[\mathrm{Ni}{\left({\mathrm{H}}_{2}\mathrm{O}\right)}_{6}\right]}^{3+},{\left[\mathrm{Cu}{\left({\mathrm{H}}_{2}\mathrm{O}\right)}_{6}\right]}^{2+}\)
[Given atomic numbers: \(\mathrm{V}=23,\mathrm{Cr}=24,\mathrm{Fe}=26,\mathrm{Ni}=28\mathrm{Cu}=29\)]

[JEE Main 2024, 04 Apr (Shift 1)]

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Number of complexes from the following with even number of unpaired "d" electrons is \({\left[\mathrm{V}{\left({\mathrm{…

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