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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

Schiff’s reagent gives pink color with ?

  • Acetone
  • Acetaldehyde
  • Acetic acid
  • Methyl acetate
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Correct Answer: B. Acetaldehyde

Explanation:

Schiff’s reagent is a well-known test in organic chemistry to identify aldehydes. It ... Read More Details

2 Organic Chemistry MCQs

Lactic acid on oxidation by alkaline potassium permanganate gives: ?

  • Propionic acid
  • Cinnamic acid
  • Pyruvic acid
  • Tartaric acid
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Correct Answer: C. Pyruvic acid

Explanation:

Lactic acid is an organic compound that has both a hydroxyl group (–OH) ... Read More Details

3 Organic Chemistry MCQs

Formaldehyde on condensation in the presence of calcium hydroxide gives:

  • Formose
  • Fructose
  • Maltose
  • Xylose
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Correct Answer: A. Formose

Explanation:

Formaldehyde (CH₂O) is the simplest aldehyde in organic chemistry. When formaldehyde undergoes condensation ... Read More Details

4 Organic Chemistry MCQs

Strong nucleophile in polar aprotic solvent is ?

  • Fluoride ion
  • Bromide ion
  • Chloride ion
  • Iodide ion
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Correct Answer: A. Fluoride ion

Explanation:

The nucleophilicity of ions depends greatly on the type of solvent used. Solvents ... Read More Details

5 Organic Chemistry MCQs

Quality of petrol is measured by?

  • Octane number
  • Heptane number
  • Reforming
  • Refining
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Correct Answer: A. Octane number

Explanation:

The quality of petrol (gasoline) is commonly measured by its octane number. The ... Read More Details

6 Organic Chemistry MCQs

Acetaldehyde cannot show ?

  • Iodoform test
  • Lucas test
  • Benedict’s test
  • Tollen’s test
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Correct Answer: B. Lucas test

Explanation:

Acetaldehyde (CH₃CHO) is the simplest aliphatic aldehyde after formaldehyde. It shows characteristic reactions ... Read More Details

7 Organic Chemistry MCQs

The Clemmensen reduction of acetone yields ?

  • Ethanol
  • Ethanal
  • Propane
  • Propanol
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Correct Answer: C. Propane

Explanation:

The Clemmensen reduction is an important name reaction in organic chemistry that involves ... Read More Details

8 Organic Chemistry MCQs

O₃ reacts with CH₂=CH₂ to form ozonide. On hydrolysis it forms ?

  • Ethylene oxide
  • HCHO
  • Ethylene glycol
  • Ethyl alcohol
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Correct Answer: B. HCHO

Explanation:

Ozonolysis is a classical reaction of alkenes in which ozone (O₃) adds across ... Read More Details

9 Organic Chemistry MCQs

Dimethyl ketones are usually characterized through ?

  • Tollen’s reagent
  • Iodoform test
  • Schiff’s test
  • Benedict’s reagent
0 Comments
Correct Answer: B. Iodoform test

Explanation:

Dimethyl ketones, also known as acetone and its derivatives, are important members of ... Read More Details

10 Organic Chemistry MCQs

The typical reactions of aldehyde is ?

  • Electrophilic addition
  • Nucleophilic substitution
  • Nucleophilic addition
  • Nucleophilic elimination
0 Comments
Correct Answer: C. Nucleophilic addition

Explanation:

Aldehydes are organic compounds that contain the carbonyl group (C=O) with at least ... Read More Details

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