Question:medium
Which of the following complex ion absorbs yellow colour in the visible region?
Which of the following complex ion absorbs yellow colour in the visible region?
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Memory aid: "VIBGYOR".
Absorb Yellow (Y) \(\rightarrow\) Complementary is Violet (V).
Absorb Blue (B) \(\rightarrow\) Complementary is Orange (O).
The presence of a weak ligand like \(Cl^-\) decreases the crystal field splitting, shifting absorption towards longer wavelengths (like yellow).
Absorb Yellow (Y) \(\rightarrow\) Complementary is Violet (V).
Absorb Blue (B) \(\rightarrow\) Complementary is Orange (O).
The presence of a weak ligand like \(Cl^-\) decreases the crystal field splitting, shifting absorption towards longer wavelengths (like yellow).
Updated On: Jun 24, 2026
- \([Co(NH_3)_6]^{+3}\)
- \([Co(CN)_6]^{3-}\)
- \([Cu(H_2O)_4]^{+2}\)
- \([Co(NH_3)_5(H_2O)]^{+3}\)
- The complex \([CoCl(NH_3)_5]^{+2}\) absorbs yellow light.
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The Correct Option is
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