Start free

Chemistry · Coordination Compounds

JEE Main 2025 — 3 April, Morning Shift — Question 14

The correct order of the complexes

[Co(NH3)5(H2O)]3+(A),[Co(NH3)6]3+(B),[Co(CN)6]3−\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5}\left(\mathrm{H}_{2} \mathrm{O}\right)\right]^{3+}(\mathrm{A}),\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}(\mathrm{B}),\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3-} (C) and

[CoCl(NH3)5]2+(D)\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{5}\right]^{2+}(\mathrm{D}) in terms of wavelength of light absorbed is

  1. Option A:

    C >> B >> A >> D

  2. Option B:

    D >> C >> B >> A

  3. Option C:

    C >> B >> D >> A

  4. Option D:

    D>A>B>CD>A>B>C

    Correct

Answer: D

Step-by-step solution

D>A>B>CD>A>B>C

Δo=hcλ\Delta_{\mathrm{o}}=\frac{\mathrm{hc}}{\lambda}

More the value of Δ∘\Delta_{\circ} more energy will be obseved Δ0\Delta_{0} increases and λ\lambda decreases.

Answer key and solution verified before publishing.

Practise Coordination Compounds

Start with this question, then two more from the same chapter — with a tutor that explains every step. Free.

Solve a similar one free
Exam
JEE Main 2025
Paper
3 April, Morning Shift
Subject
Chemistry
Chapter
Coordination Compounds
Topic
Properties and importance of Coordination Complexes

More Coordination Compounds questions from this paper

The correct order of the complexes [ Co ( NH 3 ) 5 ( H 2 O ) ] 3+ ( A… | JEE Main 2025 PYQ with Solution · DhiX AI