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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

Methyl alcohol is not used as ____________?

  • A solvent
  • An antifreezing agent
  • A substitute for petrol
  • For denaturing of ethyl alcohol
0 Comments
Correct Answer: C. A substitute for petrol

Explanation:

Methyl alcohol, also known as methanol (CH₃OH), is the simplest aliphatic alcohol. It ... Read More Details

2 Organic Chemistry MCQs

Which alcohol can be prepared by fermentation?

  • CH₃OH (Methanol)
  • C₃H₇OH (Propanol)
  • CH₃–CH₂–OH (Ethanol)
  • C₆H₅OH (Phenol)
0 Comments
Correct Answer: C. CH₃–CH₂–OH (Ethanol)

Explanation:

Fermentation is one of the oldest biochemical processes used for the preparation of ... Read More Details

3 Organic Chemistry MCQs

When alcohol reacts with phosphorus halides, it gives _____________?

  • Alkyl halides
  • Alkyl amines
  • Alkanes
  • Alkynes
0 Comments
Correct Answer: A. Alkyl halides

Explanation:

Alcohols undergo substitution reactions with phosphorus halides to form alkyl halides. The hydroxyl ... Read More Details

4 Organic Chemistry MCQs

Which one of the following compounds does not contain an –OH group?

  • Ethylene glycol
  • Glycerol
  • Picric acid
  • Ethyl acetate
0 Comments
Correct Answer: D. Ethyl acetate

Explanation:

The hydroxyl group (–OH) is the functional group present in alcohols and phenols. ... Read More Details

5 Organic Chemistry MCQs

Ethers show functional group isomerism with which compound?

  • Aldehydes
  • Ketones
  • Alcohols
  • Carboxylic acids
0 Comments
Correct Answer: C. Alcohols

Explanation:

Ethers are organic compounds that have the general formula R–O–R′, where two alkyl ... Read More Details

6 Organic Chemistry MCQs

Which compound is also called lactic acid?

  • 3-Hydroxypropanoic acid
  • 2-Hydroxypropanoic acid
  • 2-Hydroxybutanoic acid
  • 3-Hydroxybutanoic acid
0 Comments
Correct Answer: B. 2-Hydroxypropanoic acid

Explanation:

Lactic acid is the common name for 2-hydroxypropanoic acid, an organic compound with ... Read More Details

7 Organic Chemistry MCQs

What is the valency of a carbon atom?

  • 1
  • 2
  • 3
  • 4
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Correct Answer: D. 4

Explanation:

The concept of valency refers to the combining capacity of an atom, which ... Read More Details

8 Organic Chemistry MCQs

The by-product of the process of saponification is ___________?

  • Methanol
  • Glycol
  • Glycerol
  • Sodium hydroxide
0 Comments
Correct Answer: C. Glycerol

Explanation:

The process of saponification is the basic chemical reaction behind soap making. In ... Read More Details

9 Organic Chemistry MCQs

Polyethylene Glycols (PEGs) are used in the preparation of which type of detergents?

  • Cationic detergents
  • Anionic detergents
  • Non-ionic detergents
  • All of the above
0 Comments
Correct Answer: C. Non-ionic detergents

Explanation:

Detergents are classified into anionic, cationic, non-ionic, and amphoteric types depending on the ... Read More Details

10 Organic Chemistry MCQs

Which type of surfactants perform well over a wide range of water hardness and pH?

  • Anionic
  • Cationic
  • Nonionic
  • Neutral
0 Comments
Correct Answer: C. Nonionic

Explanation:

Surfactants are surface-active agents that reduce the surface tension of water and help ... Read More Details

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