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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

A scale used to measure the hydrogen ion concentration in a solution is known as ?

  • Thermometer
  • Viscometer
  • pH Scale
  • Stagmometer
0 Comments
Correct Answer: C. pH Scale

Explanation:

The pH scale is a scientific tool used to measure the hydrogen ion ... Read More Details

2 Physical Chemistry MCQs

When ammonia is used as a refrigerant in a vapor compression cycle, which type of tubing is preferred?

  • Copper tubing
  • Steel tubing
  • Both A & B
  • Material does not matter for the refrigerant
0 Comments
Correct Answer: B. Steel tubing

Explanation:

Ammonia (NH₃) is a widely used refrigerant in vapor compression cycles due to ... Read More Details

3 Organic Chemistry MCQs

The solution that remains after crystals have formed is called what?

  • Mother liquor
  • Dilute solution
  • Residue
  • Both A & B
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Correct Answer: A. Mother liquor

Explanation:

In crystallization, a common method for purifying solid compounds, crystals form from a ... Read More Details

4 Organic Chemistry MCQs

Which of the following is an artificial man-made fiber?

  • Boron
  • Saffron
  • Rayon
  • None of these
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Correct Answer: C. Rayon

Explanation:

Artificial or man-made fibers are fibers produced from chemical substances rather than obtained ... Read More Details

5 Inorganic Chemistry MCQs

Carbon, Diamond, and Graphite are collectively called what?

  • Allotropes
  • Isomers
  • Isomorphs
  • Isotopes
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Correct Answer: A. Allotropes

Explanation:

Carbon exists in several forms with different physical structures but the same chemical ... Read More Details

6 Inorganic Chemistry MCQs

Actinides are the elements with atomic numbers in which range?

  • 97 to 104
  • 101 to 115
  • 89 to 103
  • 36 to 43
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Correct Answer: C. 89 to 103

Explanation:

Actinides are a series of metallic elements in the f-block of the periodic ... Read More Details

7 Physical Chemistry MCQs

A falling barometer reading is an indication of what?

  • Snow
  • Storm
  • Intense heat
  • Rainfall
0 Comments
Correct Answer: D. Rainfall

Explanation:

A barometer is an instrument used to measure atmospheric pressure. Atmospheric pressure is ... Read More Details

8 Physical Chemistry MCQs

One fathom is equal to how many feet?

  • 6 feet
  • 6 meters
  • 60 feet
  • 100 cm
0 Comments
Correct Answer: A. 6 feet

Explanation:

A fathom is a traditional unit of length used primarily to measure the ... Read More Details

9 Inorganic Chemistry MCQs

What are rocks called that contain metallic minerals?

  • Bitumen
  • Bauxite
  • Metalloids
  • Ores
0 Comments
Correct Answer: D. Ores

Explanation:

Rocks that contain metallic minerals are called ores. Ores are naturally occurring rocks ... Read More Details

10 Environmental Chemistry MCQs

What is the main cause of soil pollution?

  • Aerosol
  • Ozone
  • Acid rain
  • PAN
0 Comments
Correct Answer: C. Acid rain

Explanation:

Soil pollution occurs when the natural composition of soil is disturbed due to ... Read More Details

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