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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 Physical Chemistry MCQs

Barometer was invented by ?

  • Pascal
  • Torricelli
  • Newton
  • Huygen
0 Comments
Correct Answer: B. Torricelli

Explanation:

A barometer is a scientific instrument designed to measure atmospheric pressure. The credit ... Read More Details

2 Physical Chemistry MCQs

Which of the following is known as absolute zero?

  • 0°C
  • 273K
  • 273.16°C
  • -273.16°C
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Correct Answer: D. -273.16°C

Explanation:

Absolute zero is a fundamental concept in thermodynamics and physical chemistry, representing the ... Read More Details

3 Physical Chemistry MCQs

Charle’s Law was given by Jacques Charles in?

  • 1785
  • 1787
  • 1880
  • 1885
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Correct Answer: B. 1787

Explanation:

Charles’s Law is one of the fundamental gas laws in physical chemistry. It ... Read More Details

4 Physical Chemistry MCQs

Real gases show ideal behavior at?

  • Low Temp & High Pressure
  • High Temp & Low Pressure
  • High Temp & High Pressure
  • Low Temp & Low Pressure
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Correct Answer: B. High Temp & Low Pressure

Explanation:

The concept of ideal gas behavior comes from the Ideal Gas Law:


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5 Physical Chemistry MCQs

Which of the following is unit of Viscosity?

  • Decibell
  • Torr
  • Poise
  • Hertz
0 Comments
Correct Answer: C. Poise

Explanation:

Viscosity is a fundamental physical property of fluids that describes their resistance to ... Read More Details

6 Physical Chemistry MCQs

Which instrument is used to measure the viscosity?

  • Hygrometer
  • Hydrometer
  • Anemometer
  • Viscometer
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Correct Answer: D. Viscometer

Explanation:

Viscosity is a measure of a fluid’s resistance to flow. It describes how ... Read More Details

7 Physical Chemistry MCQs

Hydrogen bonding is present in ?

  • Water
  • Ethyl Alcohol
  • Phenol
  • All of these
0 Comments
Correct Answer: D. All of these

Explanation:

Hydrogen bonding is a type of intermolecular force that arises when a hydrogen ... Read More Details

8 Organic Chemistry MCQs

Acetaldehyde cannot show ?

  • Iodoform test
  • Lucas test
  • Benedict’s test
  • Tollen’s test
0 Comments
Correct Answer: B. Lucas test

Explanation:

Acetaldehyde (CH₃CHO) is the simplest aliphatic aldehyde after formaldehyde. It shows characteristic reactions ... Read More Details

9 Organic Chemistry MCQs

The Clemmensen reduction of acetone yields ?

  • Ethanol
  • Ethanal
  • Propane
  • Propanol
0 Comments
Correct Answer: C. Propane

Explanation:

The Clemmensen reduction is an important name reaction in organic chemistry that involves ... Read More Details

10 Organic Chemistry MCQs

O₃ reacts with CH₂=CH₂ to form ozonide. On hydrolysis it forms ?

  • Ethylene oxide
  • HCHO
  • Ethylene glycol
  • Ethyl alcohol
0 Comments
Correct Answer: B. HCHO

Explanation:

Ozonolysis is a classical reaction of alkenes in which ozone (O₃) adds across ... Read More Details

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