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Coordination Compounds — NEET Chemistry MCQs

30 questions written by hand against the NCERT chapter. Every wrong option is explained, not just the right one.

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Sample questions from this chapter

According to Werner's theory, what is the primary valence of a metal?
  1. Its normally ionisable valence, satisfied by negative ions ✓
  2. Its fixed coordination number and spatial arrangement
  3. The number of neutral ligands only
  4. The number of unpaired d electrons
Answer: A. Werner's primary valence corresponds to oxidation state and is normally ionisable; secondary valence is non-ionisable and equals coordination number. Interchanging the two is the main trap.
Why not B: Fixed coordination number corresponds to Werner's secondary valence.
Why not C: Primary valence is an oxidation-state concept and is not counted from neutral ligands.
Why not D: Magnetic electron count is unrelated to Werner's two-valence classification.
What is the IUPAC name of K3[Fe(CN)6]?
  1. Potassium hexacyanidoiron(III)
  2. Tripotassium iron hexacyanide
  3. Potassium hexacyanidoferrate(III) ✓
  4. Potassium hexacyanidoferrate(II)
Answer: C. The anionic entity is hexacyanidoferrate and iron is +3: x−6 = −3. Ferrate(II) is the closest trap from confusing ferricyanide with ferrocyanide.
Why not A: Because the complex is anionic, iron takes the Latin-root ferrate name.
Why not B: Stoichiometric prefixes for counter ions are not used this way in naming ionic compounds.
Why not D: Six CN− ligands and a −3 complex charge require Fe(III), not Fe(II).
For [Fe(C2O4)3]3-, what are the oxidation state of Fe and its coordination number?
  1. Fe(III), CN 6 ✓
  2. Fe(II), CN 3
  3. Fe(VI), CN 6
  4. Fe(III), CN 3
Answer: A. x + 3(−2) = −3 gives x = +3, and three didentate oxalates give CN = 3×2 = 6. The Fe(III), CN 3 option stops at ligand count.
Why not B: Three oxalates contribute −6 total, so a −3 complex requires Fe(III), and coordination counts donor atoms.
Why not C: The six donor atoms determine coordination number, not metal charge.
Why not D: Each of three oxalate ligands is didentate, giving six Fe-O bonds.

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Other NEET Chemistry chapters

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Questions

How many NEET questions are there on Coordination Compounds?

This chapter test has 30 questions — 10 easy, 14 medium and 6 hard — all written against the NCERT Class 12 chapter.

Is this NEET Chemistry chapter test free?

Yes. Every chapter test is free with no login, and you get your all-India rank on every one. Nothing on the site is on sale right now.

Do the questions explain the wrong options?

Yes — every distractor carries its own explanation naming the specific misconception that makes a student pick it. That is the part most question banks skip, and it is the part that changes your next attempt.