info@jobexams.pk
Job Exams Hero

Chemistry MCQs

Prepare for competitive exams with our topic-wise Chemistry MCQs covering fundamental and advanced concepts. These multiple-choice questions include atomic structure, chemical bonding, periodic table, acids & bases, organic chemistry, thermodynamics, chemical equations, mole concept, electrochemistry, and biochemistry. Ideal for science students and job aspirants appearing in PPSC, FPSC, CSS, NTS, SPSC, BPSC, KPSC, ETEA, AJKPSC, and other testing services. A valuable resource for teachers, educators, and candidates targeting science educator posts, laboratory roles, and general science sections in public sector exams.

Browse Categories
Quick Results 0 found

Question Coming Soon!

"" isn't in our database yet, but we're adding new questions daily.

1 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

2 Organic Chemistry MCQs

Ethanol and methanol can be distinguished by a ?

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

Explanation:

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

3 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

4 Physical Chemistry MCQs

Water gas at 450 °C and 200 atm with ZnO + Cr₂O₃ catalyst gives which product?

  • Methanol
  • Ethanol
  • Carbonic acid
  • Methane
0 Comments
Correct Answer: A. Methanol

Explanation:

Water gas is a mixture of carbon monoxide (CO) and hydrogen (H₂) obtained ... 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

Question Categories
General Knowledge Category MCQ'S
Computer Category MCQ'S
Chemistry Category MCQ'S
Pak Departmental Laws & Rules MCQs