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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

Phenol was first isolated by Runge from which source?

  • Vegetable oil
  • Coal tar
  • Wood
  • None of these
0 Comments
Correct Answer: B. Coal tar

Explanation:

Phenol (C₆H₅OH) is one of the simplest aromatic alcohols and an important organic ... Read More Details

2 Organic Chemistry MCQs

The hydrogenation of phenol in the presence of Ni and heat gives ?

  • Cyclohexane
  • n-Hexane
  • 1-Hexanol
  • Cyclohexanol
0 Comments
Correct Answer: D. Cyclohexanol

Explanation:

Phenol (C₆H₅OH) is an aromatic alcohol in which a hydroxyl group (-OH) is ... Read More Details

3 Organic Chemistry MCQs

Ethanol and methanol can be distinguished by a ?

  • Iodoform test
  • Lucas test
  • Benedict’s test
  • Tollens test
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Correct Answer: A. Iodoform test

Explanation:

Ethanol and methanol are both primary alcohols, but they can be distinguished by ... Read More Details

4 Organic Chemistry MCQs

Which one of the following alcohol has greater boiling point?

  • Ethanol
  • Ethylene glycol
  • Glycerol
  • Methanol
0 Comments
Correct Answer: C. Glycerol

Explanation:

The boiling point of alcohols depends mainly on molecular weight, number of hydroxyl ... Read More Details

5 Organic Chemistry MCQs

Rectified spirit contains ?

  • 12% alcohol
  • 90% alcohol
  • 95% alcohol
  • 100% alcohol
0 Comments
Correct Answer: C. 95% alcohol

Explanation:

Rectified spirit is a highly concentrated form of ethanol obtained by repeated distillation ... Read More Details

6 Organic Chemistry MCQs

The oxidation of isopropyl alcohol will yield _____________?

  • Propane
  • Propanol
  • Propanone
  • Propanoic acid
0 Comments
Correct Answer: C. Propanone

Explanation:

Isopropyl alcohol is the common name for 2-propanol (CH₃–CHOH–CH₃), a secondary alcohol. The ... Read More Details

7 Organic Chemistry MCQs

The distinction test for primary, secondary, and tertiary alcohols requires them to react with _____________?

  • Conc. HCl and anhydrous SOCl₂
  • Conc. HCl and anhydrous CaCl₂
  • Conc. HCl and anhydrous PCl₂
  • Conc. HCl and anhydrous ZnCl₂
0 Comments
Correct Answer: D. Conc. HCl and anhydrous ZnCl₂

Explanation:

To distinguish between primary, secondary, and tertiary alcohols, chemists use a method known ... Read More Details

8 Organic Chemistry MCQs

The given dissociation constant (Ka) value 1.3×10⁻¹⁰ is of ?

  • Alcohol
  • Acetic acid
  • Water
  • Phenol
0 Comments
Correct Answer: D. Phenol

Explanation:

The dissociation constant (Ka) is an important measure of the strength of an ... Read More Details

9 Organic Chemistry MCQs

When phenol is heated with concentrated nitric acid, the product formed is ____________?

  • Picric acid
  • o-Nitrophenol
  • 1,3,5-Trinitrobenzene
  • p-Nitrophenol
0 Comments
Correct Answer: A. Picric acid

Explanation:

Phenol is an aromatic compound with a hydroxyl group (-OH) attached to a ... Read More Details

10 Organic Chemistry MCQs

Which compound shows hydrogen bonding?

  • C₂H₆ (Ethane)
  • C₂H₅Cl (Ethyl chloride)
  • CH₃OCH₃ (Dimethyl ether)
  • C₂H₅OH (Ethanol)
0 Comments
Correct Answer: D. C₂H₅OH (Ethanol)

Explanation:

Hydrogen bonding is a special type of dipole–dipole interaction that occurs between a ... Read More Details

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