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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

Octane number is 0 value for

  • iso-octane
  • n-hexane
  • n-heptane
  • iso-heptane
0 Comments
Correct Answer: C. n-heptane

Explanation:

The octane number or octane rating of a fuel ... Read More Details

2 Organic Chemistry MCQs

The general formula for alkenes is: _____________?

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

Explanation:

Alkenes are a class of unsaturated hydrocarbons that contain at least ... Read More Details

3 Organic Chemistry MCQs

Polyvinyl acetate is the polymer of __________?

  • Vinyl Chloride
  • Vinyl acetate
  • Formaldehyde
  • Methyl methacrylate
0 Comments
Correct Answer: B. Vinyl acetate

Explanation:

Polyvinyl acetate (PVA) is a synthetic polymer widely used in adhesives, paints, coatings, ... Read More Details

4 Organic Chemistry MCQs

Identify which of the following is not an unsaturated hydrocarbon.

  • C₄H₆
  • C₅H₁₂
  • C₃H₄
  • C₆H₁₀
0 Comments
Correct Answer: B. C₅H₁₂

Explanation:

Hydrocarbons are divided into two main types based on the nature of bonds ... Read More Details

5 Organic Chemistry MCQs

Aliphatic hydrocarbons with only single covalent bonds are called?

  • Alkanes
  • Alkynes
  • Alkenes
  • A & C
0 Comments
Correct Answer: A. Alkanes

Explanation:

Hydrocarbons are organic compounds made up of only carbon and hydrogen atoms. They ... Read More Details

6 Organic Chemistry MCQs

Mass difference between adjacent members of a homologous series is?

  • 14 amu
  • 12 amu
  • 18 amu
  • 22 amu
0 Comments
Correct Answer: A. 14 amu

Explanation:

A homologous series is a group of organic compounds having the same functional ... Read More Details

7 Organic Chemistry MCQs

The valency of Carbon is _________?

  • 2
  • 3
  • 4
  • 1
0 Comments
Correct Answer: C. 4

Explanation:

Valency is defined as the combining capacity of an atom, determined by the ... Read More Details

8 Organic Chemistry MCQs

All members of homologous series have different __________?

  • Chemical properties
  • Functional group
  • Physical properties
  • All of them
0 Comments
Correct Answer: C. Physical properties

Explanation:

A homologous series is a group of organic compounds having the same functional ... Read More Details

9 Organic Chemistry MCQs

The marsh gas is ___________?

  • Ethane
  • Methane
  • Propane
  • Butane
0 Comments
Correct Answer: B. Methane

Explanation:

Marsh gas is the common name for methane, a simple hydrocarbon ... Read More Details