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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

When sulphuric acid (H₂SO₄) is treated with ethanol (C₂H₅OH), sulphuric acid acts as:

  • An acid
  • A dehydrating agent
  • An oxidizing agent
  • A sulphonating agent
0 Comments
Correct Answer: B. A dehydrating agent

Explanation:

When ethanol (C₂H₅OH) is treated with concentrated sulphuric acid (H₂SO₄), the acid does ... Read More Details

2 Organic Chemistry MCQs

Which halogen is used in Teflon?

  • Iodine (I₂)
  • Bromine (Br₂)
  • Chlorine (Cl₂)
  • Fluorine (F₂)
0 Comments
Correct Answer: D. Fluorine (F₂)

Explanation:

Teflon is a widely used polymer known for its non-stick and chemical-resistant properties. ... Read More Details

3 Organic Chemistry MCQs

Alkanes containing a methyl group on the second carbon of the main chain are called ?

  • Iso-alkane
  • Normal-alkane
  • Neo-alkane
  • Branched-alkane
0 Comments
Correct Answer: A. Iso-alkane

Explanation:

Alkanes are hydrocarbons containing only single carbon–carbon bonds and are classified based on ... Read More Details

4 Organic Chemistry MCQs

Alkanes are also known as ?

  • Saturated hydrocarbon
  • Unsaturated hydrocarbon
  • Paraffins
  • Both A & C
0 Comments
Correct Answer: C. Paraffins

Explanation:

Alkanes are a class of hydrocarbons that contain only single bonds between carbon ... Read More Details

5 Organic Chemistry MCQs

Hydrogenolysis results in the formation of ?

  • Alkane
  • Alkene
  • Alkyne
  • Aldehydes
0 Comments
Correct Answer: A. Alkane

Explanation:

Hydrogenolysis is an organic reaction in which a chemical bond, usually a carbon–heteroatom ... Read More Details

6 Organic Chemistry MCQs

Removal of carbon dioxide (CO₂) from a compound is called ?

  • Carboxylation
  • Decarboxylation
  • Esterification
  • Hydroxylation
0 Comments
Correct Answer: B. Decarboxylation

Explanation:

Decarboxylation is the process in which a molecule of carbon dioxide (CO₂) is ... Read More Details

7 Organic Chemistry MCQs

Molozonide is unstable and changes into ozonide on __________________?

  • Reduction
  • Oxidation
  • Hydrolysis
  • Rearrangement
0 Comments
Correct Answer: D. Rearrangement

Explanation:

When ozone reacts with an alkene, the reaction first forms an unstable intermediate ... Read More Details

8 Organic Chemistry MCQs

What is the compound R–Mg–Br called?

  • Grignard reagent
  • Metallic alkyl halide
  • Both A & B
  • Alkyl
0 Comments
Correct Answer: A. Grignard reagent

Explanation:

The compound R–Mg–Br is known as a Grignard reagent. It is an organometallic ... Read More Details

9 Organic Chemistry MCQs

Which of the following is the most reactive hydrocarbon?

  • Ethane
  • Ethyne
  • Ethene
  • Benzene
0 Comments
Correct Answer: C. Ethene

Explanation:

The reactivity of hydrocarbons depends on the type of bonding between carbon atoms ... Read More Details

10 Organic Chemistry MCQs

Introduction of a nitro group (–NO₂) in a molecule is called ?

  • Nitration
  • Halogenation
  • Sulphonation
  • Amination
0 Comments
Correct Answer: A. Nitration

Explanation:

Nitration is a fundamental chemical reaction in organic chemistry that involves the introduction ... Read More Details

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