VKC ScienceChemistry for written exams Telegram

UPSC Combined Geo-Scientist

Chemist

  • 3 descriptive papers
  • 200 marks each
  • 3 h per paper

Mains Paper I covers inorganic chemistry.

UPSC Combined Geo-Scientist, Mains · 2022 · Mains Paper I

Q11(b). Using magnetism to distinguish spin states

Question

How is magnetic data useful to distinguish between strong field and weak field octahedral complexes of d¹ to d⁹ metals?

Answer in brief

Spin-only moments distinguish high- and low-spin octahedral d⁴–d⁷ configurations. For d¹–d³ and d⁸–d⁹, the unpaired-electron counts are the same in both field regimes.

Part of VKC Basic

Read the key points and the full model answer with VKC Basic

VKC Basic (₹999 for 6 months) opens every solved answer, the notes, the handbook and the daily answer archive. Every Mains test series includes it.

See what is included Already a member? Sign in

The full model answer

As written for the answer booklet: the diagram carries the working, the lines stay short. Read here only; it is not offered as a download.

The handwritten model answer pages open with the VKC plan.
Read the whole 2022 solution2022 question paper

Topic notes: crystal field theory, with every Civil Services, IFoS and Geo-Scientist PYQ →

Coversmagnetic momenthigh spin low spinstrong field weak fieldspin-only formulamagnetic susceptibility

All parts of Question 11