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Friday, 9 October

NEET UG 2017 · Chemistry · Question 73

NEET 2017 Chemistry, question 73

Question 73 of the NEET 2017 paper (code A) is a Chemistry question from Coordination Compounds. Its idea, Absorbed Wavelength and Splitting Energy, was asked twice, in 2017 and 2025, across NEET 2017–2026. The CBSE official answer key gives option 1.

Updated 2026-10-08

Q73 · Chemistry

Correct increasing order for the wavelengths of absorption in the visible region for the complexes of Co3+\mathrm{Co^{3+}} is :

  1. 1[Co(en)3]3+,[Co(NH3)6]3+,[Co(H2O)6]3+\mathrm{[Co(en)_3]^{3+}, [Co(NH_3)_6]^{3+}, [Co(H_2O)_6]^{3+}}Official answer
  2. 2[Co(H2O)6]3+,[Co(en)3]3+,[Co(NH3)6]3+\mathrm{[Co(H_2O)_6]^{3+}, [Co(en)_3]^{3+}, [Co(NH_3)_6]^{3+}}
  3. 3[Co(H2O)6]3+,[Co(NH3)6]3+,[Co(en)3]3+\mathrm{[Co(H_2O)_6]^{3+}, [Co(NH_3)_6]^{3+}, [Co(en)_3]^{3+}}
  4. 4[Co(NH3)6]3+,[Co(en)3]3+,[Co(H2O)6]3+\mathrm{[Co(NH_3)_6]^{3+}, [Co(en)_3]^{3+}, [Co(H_2O)_6]^{3+}}

Official answer: option 1 · CBSE official answer key

Same idea

Absorbed Wavelength and Splitting Energy, in other papers

NEET asked this idea twice, in 2017 and 2025. The other question below.

  • 2025 Q57The correct order of the wavelength of light absorbed by the following complexes is, A. [Co(NH3)6]3+[Co(NH_3)_6]^{3+} B. [Co(CN)6]3−[Co(CN)_6]^{3-} C.…One-line MCQ · Medium

Absorbed Wavelength and Splitting Energy: every question and how it was framed

The chapter

Coordination Compounds in ten years of NEET

27 questions from 2017–2026, asked in 10 of 10 papers, about 2.6 a paper. Crystal Field Theory alone had 10.

Chapter analysisStudy this chapterPractise this chapter

Coordination Compounds: questions per paper

0364’173’181’191’202’212’222’233’243’256’26