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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 Physical Chemistry MCQs

What is the main practical problem in hydrogen production?

  • Weight
  • Valency
  • Size
  • Chemical property
0 Comments
Correct Answer: A. Weight

Explanation:

Hydrogen is the lightest element in the periodic table. Its low weight makes ... Read More Details

2 Physical Chemistry MCQs

Why are radiations considered harmful?

  • Causes skin cancer
  • Causes anemia
  • Alters body tissue
  • Is unstable
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Correct Answer: A. Causes skin cancer

Explanation:

Radiation is considered harmful because it can damage living cells and tissues, leading ... Read More Details

3 Inorganic Chemistry MCQs

The number of ions produced by [Pt(NH₃)₂]Cl₂ in solution is __________?

  • 4
  • 2
  • 3
  • 5
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Correct Answer: C. 3

Explanation:

[Pt(NH₃)₂]Cl₂ is a classic coordination compound, also called cisplatin in medicinal chemistry, but ... Read More Details

4 Chemistry MCQs

Which of the following is solid?

  • Water
  • Stone
  • Both
  • None
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Correct Answer: B. Stone

Explanation:

Matter exists in three primary states: solid, liquid, and gas. Each state has ... Read More Details

5 Environmental Chemistry MCQs

Which gas is used for the artificial ripening of green fruits?

  • Carbon dioxide
  • Acetylene
  • Ethane
  • Ethylene
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Correct Answer: D. Ethylene

Explanation:

Artificial ripening of fruits is a common practice in agriculture and fruit marketing ... Read More Details

6 Physical Chemistry MCQs

A phonon is the quantum of __________?

  • Longitudinal wave
  • Elastic wave
  • Transverse wave
  • Electromagnetic wave
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Correct Answer: B. Elastic wave

Explanation:

In solid-state physics and physical chemistry, a phonon is defined as the quantized ... Read More Details

7 Physical Chemistry MCQs

The concept of ensemble in statistical mechanics was introduced by __________?

  • Boltzmann
  • Gibbs
  • Carnot
  • Maxwell
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Correct Answer: B. Gibbs

Explanation:

In statistical mechanics, the term ensemble refers to a large collection of hypothetical ... Read More Details

8 Physical Chemistry MCQs

Which molecule has the strongest London dispersion forces?

  • Hydrogen gas
  • Water
  • Bromine
  • Hydrochloric acid
0 Comments
Correct Answer: B. Water

Explanation:

London dispersion forces are a type of van der Waals force present in ... Read More Details

9 Inorganic Chemistry MCQs

Urea used as a fertilizer contains __________ of nitrogen (N).

  • 57% N
  • 73% N
  • 46% N
  • 53% N
0 Comments
Correct Answer: C. 46% N

Explanation:

Urea (CO(NH₂)₂) is one of the most widely used nitrogenous fertilizers in agriculture. ... Read More Details

10 Physical Chemistry MCQs

Which of the following is the most viscous?

  • Glycerine
  • Water
  • Honey
  • Spirit
0 Comments
Correct Answer: C. Honey

Explanation:

Viscosity is a physical property of liquids that measures their resistance to flow. ... Read More Details

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