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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

In aldehydes and ketones, carbon of carbonyl group is ____________?

  • sp³ hybridised
  • sp² hybridised
  • sp hybridised
  • Unhybridised
0 Comments
Correct Answer: B. sp² hybridised

Explanation:

In aldehydes and ketones, the carbonyl group (>C=O) is the defining functional group. ... Read More Details

2 Organic Chemistry MCQs

Which of the following gases when passed through warm dilute solution of H₂SO₄ in presence of HgSO₄ gives acetaldehyde?

  • CH₄
  • C₂H₆
  • C₂H₄
  • C₂H₂
0 Comments
Correct Answer: D. C₂H₂

Explanation:

Acetylene (C₂H₂), also known as ethyne, is the only gas among the given ... Read More Details

3 Physical Chemistry MCQs

The process by which a substance absorbs moisture upon exposure to atmosphere is called?

  • Efflorescence
  • Dehydrogenation
  • Desalination
  • Deliquescence
0 Comments
Correct Answer: D. Deliquescence

Explanation:

Deliquescence is a physical process where certain substances absorb moisture from the air ... Read More Details

4 Chemistry MCQs

Amino acids are a product of the digestion of:

  • Carbohydrates
  • Fats
  • Proteins
  • Vitamins
0 Comments
Correct Answer: C. Proteins

Explanation:

Amino acids are the result of the chemical breakdown of proteins during digestion. ... Read More Details

5 Chemistry MCQs

24g of an unknown gas occupied 8.4 dm³ at STP. Identify the gas among the following:

  • SO₃
  • SO₂
  • C₆H₆
  • C₃H₈
0 Comments
Correct Answer: B. SO₂

Explanation:

To identify an unknown gas, we are given its mass (24 grams) and ... Read More Details

6 Chemistry MCQs

The maximum mass is present in 1 dm³ for the following gas at STP:

  • C₃H₈
  • CO₂
  • CO
  • CS₂
0 Comments
Correct Answer: D. CS₂

Explanation:

At standard temperature and pressure (STP), 1 mole of any ideal gas occupies ... Read More Details

7 Chemistry MCQs

The maximum amount of product obtained by a balanced chemical equation is called as __________?

  • Practical yield
  • Theoretical yield
  • Actual yield
  • NOT
0 Comments
Correct Answer: B. Theoretical yield

Explanation:

In chemistry, every chemical reaction is represented by a balanced chemical equation, which ... Read More Details

8 Chemistry MCQs

The theoretical yield is, when % yield and actual yield are 55% and 24g respectively:

  • 40g
  • 43.6g
  • 45g
  • 41.4g
0 Comments
Correct Answer: B. 43.6g

Explanation:

In chemistry, theoretical yield is the maximum amount of product that can be ... Read More Details

9 Chemistry MCQs

Which one of the following types of glass can cut ultraviolet rays?

  • Jena Glass
  • Soda Glass
  • Pyrex Glass
  • Crookes Glass
0 Comments
Correct Answer: D. Crookes Glass

Explanation:

Different types of glass are manufactured for specific purposes by altering their chemical ... Read More Details

10 Chemistry MCQs

The maximum number of electrons that can be filled in the first shell of an atom are _____.

  • 2 electrons
  • 8 electrons
  • 18 electrons
  • 4 electrons
0 Comments
Correct Answer: A. 2 electrons

Explanation:

Atoms are made up of three basic particles: protons, neutrons, and electrons. Electrons ... Read More Details

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