Exams › NEET › Chemistry

Which of the following complex ions is expected to absorb visible light?

1. [Ti(en)₂(NH₃)₂]⁴⁺
2. [Cr(NH₃)₆]³⁺
3. [Zn(NH₃)₄]²⁺
4. [Sc(H₂O)₃(NH₃)₃]³⁺

Correct answer: [Cr(NH₃)₆]³⁺

Solution

The complex [Cr(NH₃)₆]³⁺ contains Cr³⁺, which has unpaired d-electrons. This allows d-d transitions, leading to absorption in the visible region. The other complexes either lack unpaired d-electrons or have no d-electrons at all.

Related NEET Chemistry questions

• What is the IUPAC name of \( K_{2}\left[P t C l_{6}\right] ? \)
• The structures of \( \left[N i(C O)_{4}\right] \) and \( \left[N i\left(\left(P h_{3}\right)_{3} P\right)_{2} C l_{2}\right] \) are:
• The IUPAC name of \( \left[\mathrm{Ni}\left(\mathrm{NH}_{3}\right)_{4}\right]\left[\mathrm{NiCl}_{4}\right] \) is :
• Some salts, although containing two different metallic elements, give test for one of them in solution. Such salts are:
• Actinides have higher tendency to form complexes than Lanthanides, due to
• Select the correct order of ions with respect to their ionic radii.

⚔️ Practice NEET Chemistry free + battle 1v1 →