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Coordination Compounds question

2025 · 22 Jan · Shift 2 · Q4
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  5. /2025 · 22 Jan · Shift 2 · Q4

Coordination Compounds question

2025 · 22 Jan · Shift 2 · Q4

JEE MainChemistryCoordination CompoundsMCQ+4 / −1
The correct order of the following complexes in terms of their crystal field stabilization energies is :
  1. A
    [Co(NH3)4]2+<[Co(NH3)6]2+<[Co(NH3)6]3+<[Co(en)3]3+\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\right]^{2+}\lt \left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{2+}\lt \left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}\lt \left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}[Co(NH3​)4​]2+<[Co(NH3​)6​]2+<[Co(NH3​)6​]3+<[Co(en)3​]3+
  2. B
    [Co(NH3)4]2+<[Co(NH3)6]2+<[Co(en)3]3+<[Co(NH3)6]3+\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\right]^{2+}\lt \left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{2+}\lt \left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}\lt \left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}[Co(NH3​)4​]2+<[Co(NH3​)6​]2+<[Co(en)3​]3+<[Co(NH3​)6​]3+
  3. C
    [Co(NH3)6]2+<[Co(NH3)6]3+<[Co(NH3)4]2+<[Co(en)3]3+\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{2+}\lt \left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}\lt \left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\right]^{2+}\lt \left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}[Co(NH3​)6​]2+<[Co(NH3​)6​]3+<[Co(NH3​)4​]2+<[Co(en)3​]3+
  4. D
    [Co(en)3]3+<[Co(NH3)6]3+<[Co(NH3)6]2+<[Co(NH3)4]2+\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}\lt \left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}\lt \left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{2+}\lt \left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\right]^{2+}[Co(en)3​]3+<[Co(NH3​)6​]3+<[Co(NH3​)6​]2+<[Co(NH3​)4​]2+
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