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Chemistry Exam  >  Chemistry Test  >  Inorganic   >  Test: Color & Electronic Spectra - Chemistry MCQ

Color & Electronic Spectra - Free MCQ Practice Test with solutions, Chemistry


MCQ Practice Test & Solutions: Test: Color & Electronic Spectra (15 Questions)

You can prepare effectively for Chemistry Inorganic Chemistry with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Color & Electronic Spectra". These 15 questions have been designed by the experts with the latest curriculum of Chemistry 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 30 minutes
  • - Number of Questions: 15

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Test: Color & Electronic Spectra - Question 1
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The red color of oxyhaemoglobin is mainly due to the

Test: Color & Electronic Spectra - Question 2
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The molar absorptivity at λmax is minimum for

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Test: Color & Electronic Spectra - Question 3
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The bright yellow color of [Cu(phen)2]+ (phen=1, 10-phenanthroline) is due to

Test: Color & Electronic Spectra - Question 4
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The compound that absorbs the light of the longest wavelength is

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Test: Color & Electronic Spectra - Question 5
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The absorption of [Co(NH3)6]2+ is:

Test: Color & Electronic Spectra - Question 6
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The complex which exhibits lowest energy electronic absorption band is:

Test: Color & Electronic Spectra - Question 7
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Which one of the following complex ions shows minimum intensity of absorption in the UV-Visible region?

Test: Color & Electronic Spectra - Question 8
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The violet color of iodine vapours is due to

Test: Color & Electronic Spectra - Question 9
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The lowest energy d-d transition in the Cr(III) complexes varies in the order

Test: Color & Electronic Spectra - Question 10
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The pale yellow color of [Mn(H2O)6]2+ is due to

*Multiple options can be correct
Test: Color & Electronic Spectra - Question 11
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Which of the following compounds shown intervalence charge transfer transition

Test: Color & Electronic Spectra - Question 12
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Among the species given, the one possessing charge-transfer transition in the visible region is:

Detailed Solution: Question 12

"Among the species given, the one possessing charge-transfer transition in the visible region is:"

And the options are:

  • Option A: Th(C_2O_4)_3
  • Option D: [Cr(NCS)_6]^3-
  • Option C: ZnS
  • Option B: HgI_2

Charge-transfer transitions occur when an electron moves from a donor to an acceptor within the molecule. In the visible region, we typically look for species that have a metal center capable of undergoing such transitions due to their electronic configuration.

Among the options given:

  • Option A: Th(C_2O_4)_3 is a complex of thorium with oxalate ligands. Thorium is a f-block element, but the oxalate ligands typically do not participate in charge transfer with the visible region.

  • Option D: [Cr(NCS)_6]^3- is a complex of chromium with thiocyanate ligands. Chromium, being a d-block element, can have d-d transitions as well as charge-transfer transitions, especially with ligands like thiocyanate that can participate in such transitions. This makes it a likely candidate for visible region charge-transfer transitions.

  • Option C: ZnS is a semiconductor and generally does not show charge-transfer transitions in the visible region. It does have a band gap that can absorb UV light, but not typically visible light.

  • Option B: HgI_2 is mercury(II) iodide, and while heavy metal halides can have interesting electronic properties, they do not usually exhibit charge-transfer transitions in the visible region.

Based on this information, the species most likely to show charge-transfer transition in the visible region is Option D: [Cr(NCS)_6]^3-. This complex can exhibit charge-transfer transitions where the electron transfer occurs from the thiocyanate ligands to the chromium metal center.

Test: Color & Electronic Spectra - Question 13
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Amongst the following, the strongest oxidizing anion is:

Test: Color & Electronic Spectra - Question 14
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The compound which shows Metal to Ligand charge transfer is:

Test: Color & Electronic Spectra - Question 15
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Which of the following transitions are of weak intensities and lie in the visible region?

Detailed Solution: Question 15

n→n* transitions are of weak intensities and lie in the visible region.

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About this Chemistry Practice Test

This test contains 15 MCQs on Color & Electronic Spectra with detailed solutions for each question. It is part of the Inorganic Chemistry course on EduRev, designed to align with the current Chemistry syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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