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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.

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1 Inorganic Chemistry MCQs

Who discovered Argon gas?

  • Lord Rayleigh
  • Sir William Ramsay
  • Lockyer
  • John Dalton
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Correct Answer: B. Sir William Ramsay

Explanation:

Argon is a noble gas and one of the important elements in the ... Read More Details

2 Chemistry MCQs

Endothermic reactions are chemical reactions in which ________?

  • Heat is evolved
  • Heat is absorbed
  • Temperature increases
  • Light is produced
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Correct Answer: B. Heat is absorbed

Explanation:

Endothermic reactions are chemical reactions that absorb energy, usually in the form of ... Read More Details

3 Chemistry MCQs

Which of the following is the major constituent of LPG (Liquefied Petroleum Gas)?

  • Methane
  • Ethane
  • Hydrogen
  • Butane
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Correct Answer: D. Butane

Explanation:

Liquefied Petroleum Gas (LPG) is a flammable mixture of hydrocarbon gases used widely ... Read More Details

4 Chemistry MCQs

PVC (Polyvinyl Chloride) is obtained by the polymerization of which compound?

  • Propane
  • Vinyl chloride
  • Styrene
  • None of these
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Correct Answer: B. Vinyl chloride

Explanation:

Polyvinyl Chloride (PVC) is one of the most widely used synthetic polymers in ... Read More Details

5 Chemistry MCQs

Bone ash primarily contains which compound?

  • Calcium sulphate
  • Phosphoric sulphate
  • Calcium phosphate
  • None of these
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Correct Answer: C. Calcium phosphate

Explanation:

Bone ash is the residue obtained when bones are heated strongly in a ... Read More Details

6 Chemistry MCQs

Saccharin is chemically derived from which compound?

  • Toluene
  • Phenol
  • Propane
  • None of these
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Correct Answer: A. Toluene

Explanation:

Saccharin is a widely used artificial sweetener, often hundreds of times sweeter than ... Read More Details

7 Chemistry MCQs

Which of the following is not a donor atom?

  • Phosphorus
  • Antimony
  • Arsenic
  • Aluminum
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Correct Answer: D. Aluminum

Explanation:

In chemistry, a donor atom is an atom in a molecule that can ... Read More Details

8 Chemistry MCQs

Which metal is extracted from seawater?

  • Potassium
  • Magnesium
  • Aluminum
  • None of these
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Correct Answer: B. Magnesium

Explanation:

Seawater contains many dissolved minerals, including salts of sodium, magnesium, calcium, and potassium. ... Read More Details

9 Chemistry MCQs

Which of the following is the purest form of carbon?

  • Anthracite
  • Lampblack
  • Graphite
  • None of these
0 Comments
Correct Answer: A. Anthracite

Explanation:

Carbon is a versatile element found in many forms, ranging from soft, amorphous ... Read More Details

10 Chemistry MCQs

The group of minerals that chemically contain hydrocarbons is called the:

  • Silicate group
  • Organic group
  • Oxide group
  • Hydride group
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Correct Answer: B. Organic group

Explanation:

Minerals are naturally occurring substances formed in the Earth’s crust, and they are ... Read More Details

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