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Structural & Stereoisomerism — NEET Chemistry MCQs

Practice structural and stereoisomerism MCQs for NEET with answers and step-by-step explanations. Useful for chapter revision and ChemNexa mock papers.

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Structural and Stereoisomerism Revision Guide for NEET Chemistry

Structural and Stereoisomerism 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.

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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

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What to practise in Structural and Stereoisomerism

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Top 20 Structural and Stereoisomerism MCQs with Answers

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NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

1. Which principle is essential when solving a quantitative problem in Structural and Stereoisomerism?

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

2. At equilibrium in a reversible system related to Structural and Stereoisomerism, which statement is correct?

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

3. For a spontaneous process at constant T and P in a Structural and Stereoisomerism context, ΔG is:

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

4. Which statement about a catalyst in Structural and Stereoisomerism is correct?

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

5. Oxidation in a redox step relevant to Structural and Stereoisomerism means:

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

6. Reduction in a redox step relevant to Structural and Stereoisomerism means:

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

7. A Lewis acid encountered in Structural and Stereoisomerism is an:

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

8. A Lewis base encountered in Structural and Stereoisomerism is an:

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

9. Which is a state function useful in Structural and Stereoisomerism?

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

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

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

11. For a first-order kinetic process in Structural and Stereoisomerism, half-life equals:

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

12. The Arrhenius equation is:

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

13. For an ideal dilute solution relevant to Structural and Stereoisomerism, molarity is:

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

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

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

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

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

16. For an electrochemical cell, oxidation occurs at:

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

17. For an electrochemical cell, reduction occurs at:

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

18. A positive E°cell implies:

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

19. Higher bond order generally corresponds to:

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

NEET Chemistry · Structural and Stereoisomerism · Very Very Hard

20. A nucleophile in an organic reaction related to Structural and Stereoisomerism is:

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

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Structural and Stereoisomerism Practice Tests

Structural and Stereoisomerism Frequently Asked Questions

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