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Coordination Nomenclature & Isomerism NEET MCQs | ChemNexa

Practice nomenclature and isomerism MCQs for NEET with step-by-step solutions, examples and concise revision notes to clarify tricky coordination topics.

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Coordination Nomenclature and Isomerism Revision Guide for NEET Chemistry

Coordination Compounds combines nomenclature, bonding, geometry, isomerism and magnetic behaviour. The chapter becomes much easier when oxidation state, coordination number and ligand type are identified before attempting the rest of a problem.

For NEET Chemistry, practise IUPAC naming, Werner concepts, isomerism, crystal field splitting, spin state and magnetic moment.

Important Topics

  • Ligands and coordination number
  • IUPAC nomenclature
  • Oxidation state and effective atomic number concepts
  • Structural and stereoisomerism
  • Crystal field splitting
  • Magnetic behaviour and colour

Important Formulae & Relationships

  • Magnetic moment μ = √(n(n+2)) BM
  • Oxidation state + ligand charges = charge on complex

Use formulas only after checking the required units, sign convention and assumptions for the question.

What to practise in Coordination Nomenclature and Isomerism

Concept Revision

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Exam-style MCQs

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Performance Practice

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Top 20 Coordination Nomenclature and Isomerism MCQs with Answers

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NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

1. Which principle is essential when solving a quantitative problem in Coordination Nomenclature and Isomerism?

  • A. Assuming all coefficients are unity
  • B. Ignoring limiting conditions
  • C. Conservation of mass and charge where applicable
  • D. Ignoring units
Answer: C
Explanation: Mass and charge conservation are fundamental.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

2. At equilibrium in a reversible system related to Coordination Nomenclature and Isomerism, which statement is correct?

  • A. The catalyst is consumed
  • B. Forward and reverse rates are equal
  • C. All molecular motion stops
  • D. Reactant and product concentrations must be equal
Answer: B
Explanation: Dynamic equilibrium has equal forward and reverse rates.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

3. For a spontaneous process at constant T and P in a Coordination Nomenclature and Isomerism context, ΔG is:

  • A. Negative
  • B. Positive
  • C. Always zero
  • D. Always equal to ΔH
Answer: A
Explanation: Spontaneity at constant T,P requires ΔG<0.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

4. Which statement about a catalyst in Coordination Nomenclature and Isomerism is correct?

  • A. It changes ΔG°
  • B. It changes reaction enthalpy
  • C. It is always consumed
  • D. It lowers the activation barrier without changing K at fixed T
Answer: D
Explanation: Catalysts affect kinetics, not equilibrium thermodynamics.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

5. Oxidation in a redox step relevant to Coordination Nomenclature and Isomerism means:

  • A. No oxidation-number change
  • B. Only gain of hydrogen
  • C. Loss of electrons
  • D. Gain of electrons
Answer: C
Explanation: Oxidation is electron loss.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

6. Reduction in a redox step relevant to Coordination Nomenclature and Isomerism means:

  • A. Only loss of hydrogen
  • B. Gain of electrons
  • C. Loss of electrons
  • D. Increase in oxidation number
Answer: B
Explanation: Reduction is electron gain.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

7. A Lewis acid encountered in Coordination Nomenclature and Isomerism is an:

  • A. Electron-pair acceptor
  • B. Electron-pair donor
  • C. Proton acceptor only
  • D. Anion only
Answer: A
Explanation: Lewis acids accept electron pairs.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

8. A Lewis base encountered in Coordination Nomenclature and Isomerism is an:

  • A. Electron-pair acceptor
  • B. Cation only
  • C. Oxidising agent only
  • D. Electron-pair donor
Answer: D
Explanation: Lewis bases donate electron pairs.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

9. Which is a state function useful in Coordination Nomenclature and Isomerism?

  • A. Work
  • B. Path length
  • C. Enthalpy
  • D. Heat
Answer: C
Explanation: Enthalpy is path independent.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

10. The relation between standard Gibbs energy and equilibrium constant is:

  • A. ΔG°=RT/K
  • B. ΔG°=-RT lnK
  • C. ΔG°=RT lnK
  • D. ΔG°=-KRT
Answer: B
Explanation: The standard thermodynamic relation is ΔG°=-RT lnK.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

11. For a first-order kinetic process in Coordination Nomenclature and Isomerism, half-life equals:

  • A. 0.693/k
  • B. k/0.693
  • C. 1/(k[A]0)
  • D. [A]0/(2k)
Answer: A
Explanation: First-order t1/2=0.693/k.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

12. For an ideal dilute solution relevant to Coordination Nomenclature and Isomerism, molarity is:

  • A. Grams solute per mole solvent
  • B. Moles solvent per litre
  • C. Moles solute per litre solution
  • D. Moles solute per kg solvent
Answer: C
Explanation: M=n/V(L).

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

13. For a weak acid, a larger Ka generally indicates:

  • A. A stronger conjugate acid
  • B. A stronger acid
  • C. A weaker acid
  • D. No ionisation
Answer: B
Explanation: Larger Ka means greater ionisation.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

14. At 25°C, pH+pOH for aqueous solution is:

  • A. 14
  • B. 7
  • C. 1
  • D. 0
Answer: A
Explanation: pH+pOH=pKw=14 at 25°C.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

15. For an electrochemical cell, oxidation occurs at:

  • A. Cathode
  • B. Salt bridge
  • C. Electrolyte only
  • D. Anode
Answer: D
Explanation: Oxidation occurs at the anode.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

16. For an electrochemical cell, reduction occurs at:

  • A. Salt bridge
  • B. Wire
  • C. Cathode
  • D. Anode
Answer: C
Explanation: Reduction occurs at the cathode.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

17. A positive E°cell implies:

  • A. No spontaneous reaction
  • B. ΔG°<0
  • C. ΔG°>0
  • D. K<1 necessarily
Answer: B
Explanation: ΔG°=-nFE°.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

18. Higher bond order generally corresponds to:

  • A. Shorter stronger bond
  • B. Longer weaker bond
  • C. Longer stronger bond
  • D. No bond-length effect
Answer: A
Explanation: Higher bond order strengthens and shortens bonds.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

19. An electrophile in an organic reaction related to Coordination Nomenclature and Isomerism is:

  • A. Always negatively charged
  • B. Always a radical
  • C. Electron-pair acceptor
  • D. Electron-pair donor
Answer: C
Explanation: Electrophiles accept electron pairs.

NEET Chemistry · Coordination Nomenclature and Isomerism · Very Very Hard

20. The inductive effect in Coordination Nomenclature and Isomerism is transmitted mainly through:

  • A. Ionic lattice only
  • B. Sigma bonds
  • C. Pi bonds only
  • D. Hydrogen bonds
Answer: B
Explanation: Inductive polarization is transmitted through sigma bonds.

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Coordination Nomenclature and Isomerism Practice Tests

Coordination Nomenclature and Isomerism Frequently Asked Questions

What should I identify first in a coordination complex?

Find the overall charge, ligand charges, oxidation state of the metal and coordination number. These determine many later steps.

How should I learn coordination nomenclature?

Apply the naming order consistently: ligands first, metal second, oxidation state in Roman numerals, and special metal endings for anionic complexes.

Why are unpaired electrons important?

The number of unpaired electrons determines magnetic behaviour and is closely related to crystal-field splitting and high-spin or low-spin configurations.

Continue with another chapter to build connected concepts and strengthen your overall Chemistry preparation.

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