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Addition, Oxidation & Reduction – NEET Organic

Practice NEET organic MCQs on addition reactions, oxidation and reduction with detailed answers, concept notes and linked mock tests for quick revision.

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Organic Addition Oxidation and Reduction Revision Guide for NEET Chemistry

Organic Addition Oxidation and Reduction 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

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What to practise in Organic Addition Oxidation and Reduction

Concept Revision

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Exam-style MCQs

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Top 20 Organic Addition Oxidation and Reduction MCQs with Answers

These public questions are selected from the exact Organic Addition Oxidation and Reduction 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 · Organic Addition Oxidation and Reduction · Very Very Hard

1. Which principle is essential when solving a quantitative problem in Organic Addition Oxidation and Reduction?

  • 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 · Organic Addition Oxidation and Reduction · Very Very Hard

2. At equilibrium in a reversible system related to Organic Addition Oxidation and Reduction, 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 · Organic Addition Oxidation and Reduction · Very Very Hard

3. For a spontaneous process at constant T and P in a Organic Addition Oxidation and Reduction 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 · Organic Addition Oxidation and Reduction · Very Very Hard

4. Which statement about a catalyst in Organic Addition Oxidation and Reduction 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 · Organic Addition Oxidation and Reduction · Very Very Hard

5. Oxidation in a redox step relevant to Organic Addition Oxidation and Reduction 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 · Organic Addition Oxidation and Reduction · Very Very Hard

6. Reduction in a redox step relevant to Organic Addition Oxidation and Reduction 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 · Organic Addition Oxidation and Reduction · Very Very Hard

7. A Lewis acid encountered in Organic Addition Oxidation and Reduction 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 · Organic Addition Oxidation and Reduction · Very Very Hard

8. A Lewis base encountered in Organic Addition Oxidation and Reduction 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 · Organic Addition Oxidation and Reduction · Very Very Hard

9. Which is a state function useful in Organic Addition Oxidation and Reduction?

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

NEET Chemistry · Organic Addition Oxidation and Reduction · 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 · Organic Addition Oxidation and Reduction · Very Very Hard

11. For a first-order kinetic process in Organic Addition Oxidation and Reduction, 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 · Organic Addition Oxidation and Reduction · 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 · Organic Addition Oxidation and Reduction · Very Very Hard

13. For an ideal dilute solution relevant to Organic Addition Oxidation and Reduction, 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 · Organic Addition Oxidation and Reduction · 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 · Organic Addition Oxidation and Reduction · 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 · Organic Addition Oxidation and Reduction · 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 · Organic Addition Oxidation and Reduction · 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 · Organic Addition Oxidation and Reduction · 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 · Organic Addition Oxidation and Reduction · 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 · Organic Addition Oxidation and Reduction · Very Very Hard

20. A nucleophile in an organic reaction related to Organic Addition Oxidation and Reduction 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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Organic Addition Oxidation and Reduction Practice Tests

Organic Addition Oxidation and Reduction Frequently Asked Questions

How should I prepare Organic Addition Oxidation and Reduction for NEET Chemistry?

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