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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 Chemistry MCQs

What is the chemical formula of Sodium Carbonate?

  • Na₃CO₂
  • CNa₂O₃
  • Na₂CO₃
  • Na₃CO₃
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Correct Answer: C. Na₂CO₃

Explanation:

Sodium Carbonate (Na₂CO₃) is an important inorganic compound widely used in both industrial ... Read More Details

2 Chemistry MCQs

A mixture of sand and naphthalene can be separated by which method?

  • Chromatography
  • Fractional distillation
  • Sublimation
  • None of these
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Correct Answer: C. Sublimation

Explanation:

The separation of a mixture of sand and naphthalene is a ... Read More Details

3 Chemistry MCQs

What is the chemical formula of Sulfuric Acid?

  • C₂H₆O
  • CaSO
  • C₂H₄O₂
  • H₂SO₄
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Correct Answer: D. H₂SO₄

Explanation:

Sulfuric acid (H₂SO₄) is one of the most important and widely used inorganic ... Read More Details

4 Chemistry MCQs

What is the third most common gas found in the air we breathe?

  • Hydrogen
  • Neon
  • Carbon dioxide
  • Argon
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Correct Answer: D. Argon

Explanation:

The air around us is not a single substance but a mixture of ... Read More Details

5 Chemistry MCQs

What is the molecular formula of Ammonia?

  • NH
  • NH₂
  • NH₃
  • NH₄
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Correct Answer: C. NH₃

Explanation:

Ammonia (NH₃) is a simple and important chemical compound composed of one nitrogen ... Read More Details

6 Chemistry MCQs

What is the molecular weight of Ammonia (NH₃)?

  • 17.031 g/mol
  • 18.031 g/mol
  • 19.031 g/mol
  • 27.033 g/mol
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Correct Answer: A. 17.031 g/mol

Explanation:

Ammonia (NH₃) is a simple compound made of one nitrogen atom and three ... Read More Details

7 Chemistry MCQs

What is the molecular formula of Nitric Acid?

  • HNO₂
  • HNO₃
  • HN₂O₂
  • H₂NO₄
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Correct Answer: B. HNO₃

Explanation:

The molecular formula of nitric acid is HNO₃. It is one of the most important ... Read More Details

8 Inorganic Chemistry MCQs

Which one of the following hydroxides is least ionic in nature and decomposes on heating?

  • Lithium hydroxide (LiOH)
  • Sodium hydroxide (NaOH)
  • Potassium hydroxide (KOH)
  • Cesium hydroxide (CsOH)
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Correct Answer: A. Lithium hydroxide (LiOH)

Explanation:

Among alkali metal hydroxides, the ionic character depends on the size of the ... Read More Details

9 Inorganic Chemistry MCQs

The word “Alkali” means ?

  • Base
  • Basic salt
  • Ashes
  • Spirit
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Correct Answer: C. Ashes

Explanation:

The term “alkali” has historical significance in chemistry. It comes from the Arabic ... Read More Details

10 Inorganic Chemistry MCQs

Which element is necessary for normal leaf development in plants?

  • Silicon (Si)
  • Barium (Ba)
  • Magnesium (Mg)
  • Calcium (Ca)
0 Comments
Correct Answer: D. Calcium (Ca)

Explanation:

Calcium (Ca) is a crucial nutrient for plants, playing a significant role in ... Read More Details

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