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Organic Chemistry MCQs

Study key concepts of Organic Chemistry with our structured Organic Chemistry MCQs, tailored for students, teachers, and job seekers preparing for science and chemistry-related exams. These multiple-choice questions cover hydrocarbons, functional groups, alcohols, alkyl halides, carboxylic acids, amines, esters, aromatic compounds, reaction mechanisms, IUPAC nomenclature, stereochemistry, and organic synthesis pathways. Frequently asked in exams conducted by PPSC, FPSC, CSS, NTS, SPSC, BPSC, KPSC, ETEA, AJKPSC, and in tests for Lecturer Chemistry, Medical Colleges, and Pharmaceutical roles.

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1 Organic Chemistry MCQs

Clemmensen’s reduction involves the reduction of which compound?

  • Ketone
  • Aldehyde
  • Alkane
  • All of the above
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Correct Answer: A. Ketone

Explanation:

Clemmensen’s reduction is an important organic reaction used to convert ketones (and sometimes ... Read More Details

2 Organic Chemistry MCQs

Soda lime is a mixture of which of the following?

  • CaO and KOH
  • CaO and NaOH
  • NaOH and Na₂O
  • Na₂O and KOH
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Correct Answer: B. CaO and NaOH

Explanation:

Soda lime is an important chemical mixture composed primarily of calcium oxide (CaO) ... Read More Details

3 Organic Chemistry MCQs

What is formed when ethyl tetrahalide undergoes dehalogenation?

  • Ethene
  • Ethyne
  • Ethyl halide
  • All of the above are possible
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Correct Answer: B. Ethyne

Explanation:

When ethyl tetrahalide (C₂H₂X₄) undergoes dehalogenation, the product formed is ethyne (C₂H₂), also ... Read More Details

4 Organic Chemistry MCQs

Alkanes are gases up to how many carbon atoms?

  • 2
  • 3
  • 4
  • 6
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Correct Answer: C. 4

Explanation:

Alkanes are the simplest saturated hydrocarbons, consisting of carbon and hydrogen atoms connected ... Read More Details

5 Organic Chemistry MCQs

What is formed during the incomplete oxidation of methane in a limited supply of air?

  • CO₂ and H₂O
  • CH₃OH
  • CO + H₂ + C
  • CO + H₂O + C
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Correct Answer: B. CH₃OH

Explanation:

When methane (CH₄) undergoes oxidation, the product formed depends on the amount of ... Read More Details

6 Organic Chemistry MCQs

What is the order of ease of halogenation in alkanes?

  • I₂ > Cl₂ > Br₂ > F₂
  • F₂ > Cl₂ > I₂ > Br₂
  • F₂ > Cl₂ > Br₂ > I₂
  • Cl₂ > F₂ > Br₂ > I₂
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Correct Answer: C. F₂ > Cl₂ > Br₂ > I₂

Explanation:

The order of ease of halogenation in alkanes follows the trend F₂ > ... Read More Details

7 Organic Chemistry MCQs

What is the general formula of alkynes?

  • CₙH₂ₙ₊₂
  • CₙH₂ₙ₋₂
  • CₙH₂ₙ
  • CₙH₂ₙ₊₁
0 Comments
Correct Answer: B. CₙH₂ₙ₋₂

Explanation:

Alkynes are unsaturated hydrocarbons that contain at least one carbon–carbon triple bond (–C≡C–) ... Read More Details

8 Organic Chemistry MCQs

What is the removal of a halogen and a hydrogen atom from a molecule called?

  • Halogenation
  • Dehalogenation
  • Dehydrohalogenation
  • Hydrohalogenation
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Correct Answer: C. Dehydrohalogenation

Explanation:

In organic chemistry, the removal of a hydrogen atom and a halogen atom ... Read More Details

9 Organic Chemistry MCQs

The rate of an E1 elimination reaction depends on which factor?

  • The concentration of the substrate
  • The concentration of the nucleophile
  • The concentration of both substrate and nucleophile
  • The concentration of base and nucleophile
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Correct Answer: A. The concentration of the substrate

Explanation:

The E1 reaction (elimination unimolecular) is a type of elimination reaction in organic ... Read More Details

10 Organic Chemistry MCQs

Elimination bimolecular (E2) reactions involve which type of kinetics?

  • First-order kinetics
  • Second-order kinetics
  • Third-order kinetics
  • Zero-order kinetics
0 Comments
Correct Answer: B. Second-order kinetics

Explanation:

The E2 reaction (elimination bimolecular) is one of the fundamental types of elimination ... Read More Details

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