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Quantum Numbers & Electronic Configuration NEET Practice

Master quantum numbers and electronic configuration with NEET-style MCQs, stepwise explanations, concise revision notes and linked ChemNexa mock tests.

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Quantum Numbers and Electronic Configuration Revision Guide for NEET Chemistry

Quantum Numbers and Electronic Configuration is part of NEET Chemistry preparation. A strong revision plan should combine concept review with exam-style questions so that definitions, relationships, calculations and exceptions are recalled accurately.

Use the sample MCQs on this page to check understanding, then attempt the related ChemNexa tests for broader practice. When an answer is wrong, review the explanation and return to the underlying concept before attempting another set.

Important Topics

  • Core definitions and principles
  • Important equations or relationships
  • Common applications and examples
  • Frequently confused concepts
  • Exam-style multiple-choice questions
  • Error review and targeted revision

Revision Tip

Create a one-page summary of trends, structures, reactions, exceptions and key terminology for Quantum Numbers and Electronic Configuration, then test recall with mixed MCQs.

What to practise in Quantum Numbers and Electronic Configuration

Concept Revision

Revise definitions, principles, equations, trends and core ideas from Quantum Numbers and Electronic Configuration before attempting MCQs.

Exam-style MCQs

Use chapter-focused multiple-choice practice to improve accuracy, recall and application for NEET Chemistry.

Performance Practice

Attempt ChemNexa tests, review results and return to weak areas for another round of targeted revision.

Top 20 Quantum Numbers and Electronic Configuration MCQs with Answers

These public questions are selected from the exact Quantum Numbers and Electronic Configuration chapter, screened for topic relevance and deduplicated so repeated versions of the same MCQ are not shown publicly. Use them for quick revision, then sign in to attempt the complete test experience with more questions, results and performance review.

NEET Chemistry · Quantum Numbers and Electronic Configuration · Very Very Hard

1. Which principle is essential when solving a quantitative problem in Quantum Numbers and Electronic Configuration?

  • 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

2. At equilibrium in a reversible system related to Quantum Numbers and Electronic Configuration, 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

3. For a spontaneous process at constant T and P in a Quantum Numbers and Electronic Configuration 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

4. Which statement about a catalyst in Quantum Numbers and Electronic Configuration 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

5. Oxidation in a redox step relevant to Quantum Numbers and Electronic Configuration 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

6. Reduction in a redox step relevant to Quantum Numbers and Electronic Configuration 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

7. A Lewis acid encountered in Quantum Numbers and Electronic Configuration 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

8. A Lewis base encountered in Quantum Numbers and Electronic Configuration 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

9. Which is a state function useful in Quantum Numbers and Electronic Configuration?

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

NEET Chemistry · Quantum Numbers and Electronic Configuration · 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

11. For a first-order kinetic process in Quantum Numbers and Electronic Configuration, 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

12. The Arrhenius equation is:

  • A. k=Ae^(Ea/RT)
  • B. k=EaRT
  • C. k=A/RT
  • D. k=Ae^(-Ea/RT)
Answer: D
Explanation: Arrhenius equation relates k to activation energy and temperature.

NEET Chemistry · Quantum Numbers and Electronic Configuration · Very Very Hard

13. For an ideal dilute solution relevant to Quantum Numbers and Electronic Configuration, 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

14. 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

15. 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

16. 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

17. 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

18. 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

19. 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 · Quantum Numbers and Electronic Configuration · Very Very Hard

20. A nucleophile in an organic reaction related to Quantum Numbers and Electronic Configuration is:

  • A. Electron-pair acceptor
  • B. Always positively charged
  • C. Always a radical
  • D. Electron-pair donor
Answer: D
Explanation: Nucleophiles donate electron pairs.

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Quantum Numbers and Electronic Configuration Practice Tests

Quantum Numbers and Electronic Configuration Frequently Asked Questions

How should I prepare Quantum Numbers and Electronic Configuration for NEET Chemistry?

Revise the core concepts first, make a short list of important relationships or exceptions, and then solve chapter-focused MCQs while reviewing every error.

How can ChemNexa help with Quantum Numbers and Electronic Configuration practice?

This page provides public sample questions and links to published ChemNexa tests so you can combine quick revision with structured practice.

What should I do after getting an MCQ wrong?

Identify whether the mistake came from a concept gap, calculation, unit, sign, wording or memory error, review that point, and then attempt a similar question again.

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

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