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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 Inorganic Chemistry MCQs

Which metal is used in the thermite process because of its high chemical activity?

  • Iron
  • Copper
  • Aluminium
  • Zinc
0 Comments
Correct Answer: C. Aluminium

Explanation:

The thermite process, also known as the alumino-thermic process, is a metallurgical method ... Read More Details

2 Inorganic Chemistry MCQs

Which of the following elements shows the inert pair effect?

  • Boron
  • Carbon
  • Silicon
  • Tin
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Correct Answer: D. Tin

Explanation:

The inert pair effect refers to the tendency of the two outermost s-electrons ... Read More Details

3 Inorganic Chemistry MCQs

Tincal is a mineral of which element?

  • Al (Aluminium)
  • Si (Silicon)
  • B (Boron)
  • C (Carbon)
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Correct Answer: C. B (Boron)

Explanation:

Tincal is a naturally occurring mineral that serves as an important source of ... Read More Details

4 Inorganic Chemistry MCQs

Which one of the following is not a semiconductor?

  • Si (Silicon)
  • Ge (Germanium)
  • Se (Selenium)
  • Sn (Tin)
0 Comments
Correct Answer: D. Sn (Tin)

Explanation:

A semiconductor is a substance whose electrical conductivity lies between that of a ... Read More Details

5 Inorganic Chemistry MCQs

The process used for the extraction of aluminium is called ____________?

  • Hall process
  • Thermite process
  • Haber process
  • Contact process
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Correct Answer: A. Hall process

Explanation:

The industrial extraction of aluminium is carried out by the Hall-Héroult process, named ... Read More Details

6 Inorganic Chemistry MCQs

An aqueous solution of borax above 62°C gives crystals of which compound?

  • Na₂B₄O₇·4H₂O
  • Na₂B₄O₇·5H₂O
  • Na₂B₄O₇·2H₂O
  • Na₂B₄O₇·10H₂O
0 Comments
Correct Answer: B. Na₂B₄O₇·5H₂O

Explanation:

Borax, chemically known as sodium tetraborate (Na₂B₄O₇·10H₂O), is a well-known inorganic compound that ... Read More Details

7 Inorganic Chemistry MCQs

Which of the following is not a use of silicon?

  • Lubricants
  • Hydraulic brakes
  • Antifreeze
  • Water repellent
0 Comments
Correct Answer: B. Hydraulic brakes

Explanation:

Silicon is a non-metallic element belonging to group 14 of the periodic table. ... Read More Details

8 Chemistry MCQs

Why is CO₂ a gas while SiO₂ is a solid at room temperature?

  • Carbon non-metal, silicon semi-metal
  • CO₂ = molecule, SiO₂ = network structure
  • CO₂ forms multiple bonds, silicon does not
  • Silicon has only sigma bonds
0 Comments
Correct Answer: B. CO₂ = molecule, SiO₂ = network structure

Explanation:

The difference in physical state between carbon dioxide (CO₂) and silicon dioxide (SiO₂) ... Read More Details

9 Inorganic Chemistry MCQs

Which of the following statements about carbon monoxide (CO) is correct?

  • It combines with H₂O to form carbonic acid
  • It reacts with the hemoglobin in red blood cells
  • It is a powerful oxidizing agent
  • It is used to prepare aerated drinks
0 Comments
Correct Answer: B. It reacts with the hemoglobin in red blood cells

Explanation:

Carbon monoxide (CO) is a simple molecule composed of one carbon atom and ... Read More Details

10 Inorganic Chemistry MCQs

Boric acid cannot be used in which of the following applications?

  • As an antiseptic in medicine
  • For washing eyes
  • In soda bottles
  • For enamel and glazes
0 Comments
Correct Answer: C. In soda bottles

Explanation:

Boric acid (H₃BO₃) is a weak, inorganic acid with mild antiseptic, antifungal, and ... Read More Details

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