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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 Organic Chemistry MCQs

Grignard reagent gives a carboxylic acid when it reacts with ?

  • CO₂
  • CH₃CHO
  • COCl₂
  • HCN
0 Comments
Correct Answer: A. CO₂

Explanation:

A Grignard reagent is an organometallic compound of the general formula RMgX, where ... Read More Details

2 Inorganic Chemistry MCQs

The Law of Triads is applicable to __________?

  • Li, Be, B
  • F, Cl, Br
  • Cl, Br, I
  • Na, K, Rb
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Correct Answer: C. Cl, Br, I

Explanation:

One of the earliest attempts to classify the chemical elements was made by ... Read More Details

3 Inorganic Chemistry MCQs

Who developed the Telluric Helix in periodic classification?

  • Lothar Meyer
  • A.E. de Chancourtois
  • Newlands
  • Döbereiner
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Correct Answer: B. A.E. de Chancourtois

Explanation:

The Telluric Helix was one of the earliest attempts to arrange chemical elements ... Read More Details

4 Inorganic Chemistry MCQs

Which group of the periodic table contains elements that exist as monoatomic molecules?

  • Group 1
  • Group 2
  • Group 14
  • Group 18
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Correct Answer: D. Group 18

Explanation:

In the periodic table, most elements combine with identical atoms to form diatomic ... Read More Details

5 Inorganic Chemistry MCQs

The element with the electronic configuration [Kr] 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹ 6s² belongs to which block of the periodic table?

  • S-Block
  • P-Block
  • D-Block
  • F-Block
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Correct Answer: D. F-Block

Explanation:

The electronic configuration of an element shows the arrangement of electrons in its ... Read More Details

6 Inorganic Chemistry MCQs

Which of the following elements is a bridge element?

  • Beryllium (Be)
  • Chlorine (Cl)
  • Potassium (K)
  • Phosphorus (P)
0 Comments
Correct Answer: A. Beryllium (Be)

Explanation:

Bridge elements are elements that display properties of both metals and non-metals. They ... Read More Details

7 Inorganic Chemistry MCQs

What is the common oxidation state of lanthanides?

  • +3
  • +2
  • +1
  • +4
0 Comments
Correct Answer: A. +3

Explanation:

The lanthanides, also known as rare earth elements, consist of the 14 elements ... Read More Details

8 Inorganic Chemistry MCQs

Which of the following compounds is most soluble in water?

  • BaSO₄
  • SrSO₄
  • CaSO₄
  • MgSO₄
0 Comments
Correct Answer: D. MgSO₄

Explanation:

Solubility of ionic compounds in water depends on the balance between lattice energy ... Read More Details

9 Inorganic Chemistry MCQs

Which of the following orbitals has the maximum penetration effect?

  • s
  • p
  • d
  • f
0 Comments
Correct Answer: A. s

Explanation:

In atomic chemistry, penetration effect refers to the extent to which an electron ... Read More Details

10 Physical Chemistry MCQs

How much heat energy is released when the human body metabolizes 1 gram of fat?

  • 30 kJ
  • 1 kJ
  • 39 kJ
  • 29 kJ
0 Comments
Correct Answer: C. 39 kJ

Explanation:

Fats are the most energy-dense macronutrients in the human diet. When metabolized, they ... Read More Details

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