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 Chemistry MCQs

Laughing gas has a chemical composition of which two elements?

  • Nitrogen + Hydrogen
  • Nitrogen + Carbon
  • Nitrogen + Oxygen
  • Oxygen + Carbon
0 Comments
Correct Answer: C. Nitrogen + Oxygen

Explanation:

Laughing gas is a common name for a chemical compound called nitrous oxide ... Read More Details

2 Chemistry MCQs

Chemical used to kill rats and mice are ?

  • Insecticides
  • Rodenticides
  • Fungicides
  • Herbicides
0 Comments
Correct Answer: B. Rodenticides

Explanation:

Chemicals specifically designed to kill rats, mice, and other rodents are called rodenticides. ... Read More Details

3 Chemistry MCQs

Dry ice is ?

  • Methane hydrate
  • Liquid Nitrogen
  • Solid Carbon dioxide
  • Frozen Water
0 Comments
Correct Answer: C. Solid Carbon dioxide

Explanation:

Dry ice is the solid form of carbon dioxide (CO₂). Unlike ordinary ice, ... Read More Details

4 Chemistry MCQs

Chemical name of vinegar is ?

  • Sodium Nitrate
  • Dilute acetic acid
  • Chloride of lime
  • Calcium
0 Comments
Correct Answer: B. Dilute acetic acid

Explanation:

Vinegar is a common household liquid widely used in cooking, food preservation, cleaning, ... Read More Details

5 Chemistry MCQs

Bronze is an alloy of ?

  • Copper and Zinc
  • Tin and Zinc
  • Copper and Tin
  • Iron and Zinc
0 Comments
Correct Answer: C. Copper and Tin

Explanation:

Bronze is a well-known metal alloy that has been used by humans for ... Read More Details

6 Chemistry MCQs

Diamond is a very expensive ornament. It is composed of a single element ?

  • Carbon
  • Gold
  • Silver
  • None of these
0 Comments
Correct Answer: A. Carbon

Explanation:

A diamond is one of the most precious natural substances found on Earth, ... Read More Details

7 Chemistry MCQs

Which one of the following is a non-metallic mineral?

  • Manganese
  • Magnesium
  • Gypsum
  • Bauxite
0 Comments
Correct Answer: C. Gypsum

Explanation:

Minerals are naturally occurring substances found in the Earth’s crust that can be ... Read More Details

8 Chemistry MCQs

The coating of iron pipes with zinc to prevent corrosion is called?

  • Electroplating
  • Annealing
  • Galvanization
  • Vulcanization
0 Comments
Correct Answer: C. Galvanization

Explanation:

The process of coating iron or steel with a layer of zinc to ... Read More Details

9 Chemistry MCQs

Detergents dissolved in water help in cleaning clothes by?

  • Increasing the temperature of water
  • Reacting chemically with dirt
  • Reducing the surface tension of water
  • Dissolving dirt
0 Comments
Correct Answer: C. Reducing the surface tension of water

Explanation:

Detergents clean clothes effectively because they reduce the surface tension of water, allowing ... Read More Details

10 Organic Chemistry MCQs

Octane number is 0 value for

  • iso-octane
  • n-hexane
  • n-heptane
  • iso-heptane
0 Comments
Correct Answer: C. n-heptane

Explanation:

The octane number or octane rating of a fuel ... Read More Details

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