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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

Titan (moon of Saturn) and Triton (moon of Neptune) have atmospheres mainly of __________.

  • Saturn, Jupiter, Hydrogen
  • Uranus, Neptune, Nitrogen
  • Saturn, Neptune, Nitrogen
  • Mars, Venus, Hydrogen
0 Comments
Correct Answer: C. Saturn, Neptune, Nitrogen

Explanation:

Both Titan, the largest moon of Saturn, and Triton, the largest moon of ... Read More Details

2 Chemistry MCQs

What happens to Pluto’s nitrogen and methane atmosphere when it moves farther from the Sun?

  • Absent
  • Plasma
  • Frozen
  • Volatile
0 Comments
Correct Answer: C. Frozen

Explanation:

Pluto’s atmosphere is very different from Earth’s. It is thin and primarily composed ... Read More Details

3 Chemistry MCQs

Lingxi-03, developed by Galaxy Space, was launched using which carrier rocket?

  • Long March-3D
  • Long March-2D
  • Vertical March-3D
  • Orbital March-2D
0 Comments
Correct Answer: B. Long March-2D

Explanation:

The Lingxi-03 satellite, developed by the Chinese private aerospace company Galaxy Space, was ... Read More Details

4 Inorganic Chemistry MCQs

In fireworks, the green flame is produced because of which element?

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

Explanation:

The green flame seen in fireworks is produced due to the presence of ... Read More Details

5 Inorganic Chemistry MCQs

Permanent hardness of water can be removed by adding which substance?

  • Chlorine
  • Washing Soda
  • Bleaching Powder
  • None of these
0 Comments
Correct Answer: B. Washing Soda

Explanation:

Water hardness is caused mainly by dissolved salts of calcium and magnesium. Hardness ... Read More Details

6 Inorganic Chemistry MCQs

Which two elements are most commonly used for making transistors?

  • Boron and Aluminium
  • Silicon and Germanium
  • Iridium and Tungsten
  • None of these
0 Comments
Correct Answer: B. Silicon and Germanium

Explanation:

The two elements most commonly used for making transistors are silicon (Si) and ... Read More Details

7 Inorganic Chemistry MCQs

Which of the following elements was first discovered in the chromosphere of the Sun?

  • Krypton
  • Xenon
  • Neon
  • Helium
0 Comments
Correct Answer: D. Helium

Explanation:

The element that was first discovered in the chromosphere of the Sun is ... Read More Details

8 Chemistry MCQs

How many known crystalline phases of water are there?

  • 4
  • 8
  • 17
  • 18
0 Comments
Correct Answer: D. 18

Explanation:

Water is a unique substance with many unusual properties, one of which is ... Read More Details

9 Chemistry MCQs

Which of the following is not a plant product?

  • Caffeine
  • Nicotine
  • Piperine
  • Saccharin
0 Comments
Correct Answer: D. Saccharin

Explanation:

Many chemical compounds we encounter in daily life are derived from plants, known ... Read More Details

10 Chemistry MCQs

Gravity settling chambers in industries are used to remove ?

  • NOx
  • SOx
  • CO
  • Suspended particulate matter
0 Comments
Correct Answer: D. Suspended particulate matter

Explanation:

Gravity settling chambers are industrial devices designed to remove suspended particulate matter (SPM) ... Read More Details

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