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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

In aldehydes and ketones, carbon of carbonyl group is ____________?

  • sp³ hybridised
  • sp² hybridised
  • sp hybridised
  • Unhybridised
0 Comments
Correct Answer: B. sp² hybridised

Explanation:

In aldehydes and ketones, the carbonyl group (>C=O) is the defining functional group. ... Read More Details

2 Organic Chemistry MCQs

Which of the following gases when passed through warm dilute solution of H₂SO₄ in presence of HgSO₄ gives acetaldehyde?

  • CH₄
  • C₂H₆
  • C₂H₄
  • C₂H₂
0 Comments
Correct Answer: D. C₂H₂

Explanation:

Acetylene (C₂H₂), also known as ethyne, is the only gas among the given ... Read More Details

3 Organic Chemistry MCQs

The reaction of C₂H₅OH with conc. H₂SO₄ does not give __________?

  • Ethene
  • Diethyl ether
  • Acetylene
  • Ethyl hydrogen sulphate
0 Comments
Correct Answer: C. Acetylene

Explanation:

Ethanol (C₂H₅OH) reacts with concentrated sulfuric acid (H₂SO₄) under different conditions to produce ... Read More Details

4 Organic Chemistry MCQs

Identify the Lucas reagent among the following:

  • Conc. HCl & Anhydrous ZnCl₂
  • Dil. HCl & Hydrated ZnCl₂
  • Conc. HNO₃ & Anhydrous ZnCl₂
  • Conc. HNO₃ & Anhydrous MgCl₂
0 Comments
Correct Answer: A. Conc. HCl & Anhydrous ZnCl₂

Explanation:

Lucas reagent is a widely used reagent in organic qualitative analysis to distinguish ... Read More Details

5 Organic Chemistry MCQs

An alcohol produced during the formation of a soap process.

  • Butanol
  • Ethylene glycol
  • Ethanol
  • Glycerol
0 Comments
Correct Answer: D. Glycerol

Explanation:

Soap is produced through a chemical reaction called saponification, which involves heating natural ... Read More Details

6 Organic Chemistry MCQs

On oxidation, an alcohol gives an aldehyde with the same carbon atoms, the alcohol is____

  • Primary Alcohol
  • Secondary Alcohol
  • Tertiary Alcohol
  • None of these
0 Comments
Correct Answer: A. Primary Alcohol

Explanation:

Alcohols are classified into primary, secondary, and tertiary based on the number of ... Read More Details

7 Organic Chemistry MCQs

LiAlH4 converts Acetaldehyde into ___________?

  • Acetic acid
  • Methane
  • Ethyl alcohol
  • Methyl alcohol
0 Comments
Correct Answer: C. Ethyl alcohol

Explanation:

Lithium aluminium hydride (LiAlH₄) is a powerful reducing agent widely used in organic ... Read More Details

8 Organic Chemistry MCQs

The oxidation of secondary alcohol gives ?

  • Alkane
  • Carboxylic acid
  • Acetylene
  • Ketone
0 Comments
Correct Answer: D. Ketone

Explanation:

Oxidation is one of the most important reactions in alcohol chemistry. Alcohols are ... Read More Details

9 Organic Chemistry MCQs

The molecular formula of Methane gas is___________?

  • NH3
  • CH4
  • CO2
  • C6H6
0 Comments
Correct Answer: B. CH4

Explanation:

Methane is the simplest hydrocarbon and the first member of the alkane series. ... Read More Details

10 Organic Chemistry MCQs

The molecular formula of Sucrose (Sugar) is___________?

  • NH3
  • C12H22O11
  • C6H12O6
  • C6H6
0 Comments
Correct Answer: B. C12H22O11

Explanation:

Sucrose is one of the most common sugars found in nature. It is ... Read More Details

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