Class 12 Chemistry · Chapter 2 · Test 3
Complex Colours and Exchange
38 MCQs This test covers degenerate and non-degenerate d orbitals, d-orbital splitting in octahedral and tetrahedral complexes, d-d transitions, Planck’s equation, complementary colours and the effect of ligands on ΔE.
38 questions · 35 min · 38 marks
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Sample questions
The first 5 of 38. Try each one, then tap to see the answer.
Question 1
Degenerate orbitals are orbitals that:
- AHave the same energy
- BHave different shapes and energies
- CAre empty
- DHave opposite spins
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Answer: A
Degenerate means equal in energy.
Question 2
How many d orbitals are in a d subshell?
- A3
- B5
- C7
- D9
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Answer: B
A d subshell has five orbitals.
Question 3
In an isolated atom the five d orbitals are:
- ANon-degenerate
- BEmpty
- CDegenerate
- DOf different energies
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Answer: C
In a free atom all five have the same energy.
Question 4
When ligands approach a metal ion the d orbitals:
- ARemain degenerate
- BBecome empty
- CMerge into one orbital
- DSplit into non-degenerate sets
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Answer: D
The ligand electric field splits the d orbitals into two groups.
Question 5
In an octahedral complex the d orbitals split into:
- AThree lower-energy and two higher-energy orbitals
- BTwo lower-energy and three higher-energy orbitals
- CFive different levels
- DFour lower and one higher
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Answer: A
Octahedral splitting gives three lower and two higher orbitals.
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