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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

Which element is common to all acids?

  • Hydrogen
  • Carbon
  • Sulphur
  • Oxygen
0 Comments
Correct Answer: A. Hydrogen

Explanation:

All acids, whether organic or inorganic, contain the element hydrogen. The presence of ... Read More Details

2 Chemistry MCQs

Carbon, Diamond, and Graphite are collectively called what?

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

Explanation:

Carbon, Diamond, and Graphite are all forms of the element carbon, but they ... Read More Details

3 Chemistry MCQs

Which of the following is most soluble in water?

  • Camphor
  • Sulphur
  • Common salt
  • Sugar
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Correct Answer: D. Sugar

Explanation:

Solubility is the ability of a substance to dissolve in a solvent and ... Read More Details

4 Chemistry MCQs

Molasses is a byproduct of which factory/industry?

  • Fertilizer
  • Cotton seed oil
  • Sugar
  • Banaspati Ghee
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Correct Answer: C. Sugar

Explanation:

Molasses is a thick, dark syrup that is produced as a byproduct during ... Read More Details

5 Chemistry MCQs

Who discovered carbon dioxide (CO₂)?

  • Niels Bohr
  • Amedeo Avogadro
  • Joseph Black
  • None of the above
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Correct Answer: C. Joseph Black

Explanation:

Carbon dioxide (CO₂) is a colorless, odorless gas that is essential in chemistry, ... Read More Details

6 Chemistry MCQs

What is the chemical symbol of Iron?

  • Na
  • Fr
  • Fe
  • Zn
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Correct Answer: C. Fe

Explanation:

The chemical symbol of Iron is Fe. This symbol comes from the Latin ... Read More Details

7 Chemistry MCQs

Up to what temperature is crude oil heated in a furnace during the refining process?

  • 300°C
  • 350°C
  • 400°C
  • 450°C
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Correct Answer: C. 400°C

Explanation:

Crude oil is a complex mixture of hydrocarbons that must be separated into ... Read More Details

8 Chemistry MCQs

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

  • Sodium carbonate (Na₂CO₃)
  • Alum (KAl(SO₄)₂·12H₂O)
  • Potassium permanganate (KMnO₄)
  • Lime (Ca(OH)₂)
0 Comments
Correct Answer: A. Sodium carbonate (Na₂CO₃)

Explanation:

Water hardness is a common issue that affects domestic and industrial water use. ... Read More Details

9 Inorganic Chemistry MCQs

Which halogen reacts very slowly with hydrogen?

  • Fluorine (F₂)
  • Chlorine (Cl₂)
  • Bromine (Br₂)
  • Iodine (I₂)
0 Comments
Correct Answer: D. Iodine (I₂)

Explanation:

Halogens react with hydrogen to form hydrogen halides (HX). The reactivity of halogens ... Read More Details

10 Inorganic Chemistry MCQs

Which halogen has the highest electron affinity?

  • Fluorine
  • Chlorine
  • Bromine
  • Iodine
0 Comments
Correct Answer: B. Chlorine

Explanation:

Electron affinity is the energy change when an atom gains an electron. Among ... Read More Details

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