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UPSC Combined Geo-Scientist

Chemist

  • 2 objective papers
  • 120 questions each
  • 2 h per paper
  • 100 + 300 marks

Prelims Paper II covers chemistry.

UPSC Combined Geo-Scientist, Prelims · 2026 · Paper II, Chemistry · Q28 of 120

Geo-Scientist Prelims 2026 Chemistry Q28: The meridional isomer of a coordination compound [MA₃B₃] contains :…

QuestionCoordination chemistry / fac–mer isomerism

The meridional isomer of a coordination compound [MA₃B₃] contains : (where, M is the metal and A and B are ligands)

  1. (a) All A and B ligands arranged at the vertices of a planar hexagon
  2. (b) All A ligands in one plane and B ligands in a perpendicular plane in octahedral geometry
  3. (c) A and B ligands randomly arranged at the vertices of an octahedron
  4. (d) All A or B ligands are adjacent, occupying the vertices of a triangular face of octahedron

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