Q.The correct order of wavelengths of absorption in the visible region for $[Co(Cl)(NH_3)_5]^{2+}$ , $[Co(NH_3)_6]^{3+}$ , and $[Co(en)_3]^{3+}$ is:

[Co(en)_3]^{3+} < [Co(NH_3)_6]^{3+} < [Co(Cl)(NH_3)_5]^{2+}

[Co(Cl)(NH_3)_5]^{2+} < [Co(NH_3)_6]^{3+} < [Co(en)_3]^{3+}

[Co(NH_3)_6]^{3+} < [Co(en)_3]^{3+} < [Co(Cl)(NH_3)_5]^{2+}

[Co(en)_3]^{3+} < [Co(Cl)(NH_3)_5]^{2+} < [Co(NH_3)_6]^{3+}

The correct solution involves applying the fundamental concept to derive the final value step by step...

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Q.The correct order of wavelengths of absorption in the visible region for [Co(Cl)(NH3)5]2+[Co(Cl)(NH_3)_5]^{2+}[Co(Cl)(NH3​)5​]2+, [Co(NH3)6]3+[Co(NH_3)_6]^{3+}[Co(NH3​)6​]3+, and [Co(en)3]3+[Co(en)_3]^{3+}[Co(en)3​]3+ is: