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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 colour is called magenta?

  • Black
  • White
  • Yellow
  • Reddish-Purple
0 Comments
Correct Answer: D. Reddish-Purple

Explanation:

The color magenta is scientifically fascinating because it is not a spectral color—meaning ... Read More Details

2 Chemistry MCQs

The color of a sedimentary rock is often mostly determined by ?

  • Zinc
  • Iron
  • Calcium
  • All of these
0 Comments
Correct Answer: B. Iron

Explanation:

The appearance and color of sedimentary rocks are important features that help geologists ... Read More Details

3 Chemistry MCQs

How many major gases have been used in refrigerators since its invention?

  • 2
  • 3
  • 4
  • 5
0 Comments
Correct Answer: B. 3

Explanation:

Refrigeration is one of the most important technological advancements in modern life, and ... Read More Details

4 Chemistry MCQs

What is the chemical name of Oil of Vitriol?

  • Hydrochloric Acid
  • Sulphuric Acid
  • Nitric Acid
  • Muriatic Acid
0 Comments
Correct Answer: B. Sulphuric Acid

Explanation:

The term “Oil of Vitriol” is the old, historical name for the chemical ... Read More Details

5 Chemistry MCQs

Water is a good solvent of ionic salts because:

  • It has a high specific heat
  • It has no colour
  • It has a high dipole moment
  • None of these
0 Comments
Correct Answer: C. It has a high dipole moment

Explanation:

Water is often called the “universal solvent” because it dissolves more substances than ... Read More Details

6 Chemistry MCQs

LPG consists mainly of: ?

  • Methane, Ethane & Hexane
  • Ethane, Hexane & Nonane
  • Methane, Butane & Propane
  • All of these
0 Comments
Correct Answer: C. Methane, Butane & Propane

Explanation:

Liquefied Petroleum Gas (LPG) is a fuel mixture mainly made up of butane ... Read More Details

7 Chemistry MCQs

In fireworks, the green flame is produced because of __________?

  • Sodium
  • Barium
  • Mercury
  • Potassium
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Correct Answer: B. Barium

Explanation:

Fireworks produce colorful flames because of different chemical elements that emit characteristic colors ... Read More Details

8 Chemistry MCQs

Permanent hardness of water can be removed by adding __________?

  • Chlorine
  • Washing soda
  • Bleaching powder
  • None of these
0 Comments
Correct Answer: B. Washing soda

Explanation:

Permanent hardness of water is caused by the presence of dissolved salts such ... Read More Details

9 Physical Chemistry MCQs

Real gases show ideal behavior at_______?

  • Low Temp & High Pressure
  • High Temp & Low Pressure
  • High Temp & High Pressure
  • Low Temp & Low Pressure
0 Comments
Correct Answer: B. High Temp & Low Pressure

Explanation:

In physical chemistry, the behavior of gases is described by two main models: ... Read More Details

10 Physical Chemistry MCQs

Which of the following is unit of Viscosity?

  • Decibell
  • Torr
  • Poise
  • Hertz
0 Comments
Correct Answer: C. Poise

Explanation:

Viscosity is the measure of a fluid’s resistance to flow. It describes how ... Read More Details

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