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Physical Chemistry MCQs

Prepare thoroughly for exams with our carefully structured Physical Chemistry MCQs, designed for chemistry students and aspirants of science-related job tests. These multiple-choice questions cover important topics such as thermodynamics, chemical kinetics, atomic structure, gas laws, quantum chemistry, equilibrium, colligative properties, electrochemistry, phase rule, and thermochemistry. These questions are frequently included in tests conducted by PPSC, FPSC, CSS, NTS, SPSC, BPSC, KPSC, ETEA, AJKPSC, and are highly relevant for Lecturer Chemistry, lab analyst posts, and university-level exams (BSc, MSc Chemistry).

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1 Physical Chemistry MCQs

When ammonia is used as a refrigerant in a vapor compression cycle, which type of tubing is preferred?

  • Copper tubing
  • Steel tubing
  • Both A & B
  • Material does not matter for the refrigerant
0 Comments
Correct Answer: B. Steel tubing

Explanation:

Ammonia (NH₃) is a widely used refrigerant in vapor compression cycles due to ... Read More Details

2 Physical Chemistry MCQs

A falling barometer reading is an indication of what?

  • Snow
  • Storm
  • Intense heat
  • Rainfall
0 Comments
Correct Answer: D. Rainfall

Explanation:

A barometer is an instrument used to measure atmospheric pressure. Atmospheric pressure is ... Read More Details

3 Physical Chemistry MCQs

One fathom is equal to how many feet?

  • 6 feet
  • 6 meters
  • 60 feet
  • 100 cm
0 Comments
Correct Answer: A. 6 feet

Explanation:

A fathom is a traditional unit of length used primarily to measure the ... Read More Details

4 Physical Chemistry MCQs

What is the main practical problem in hydrogen production?

  • Weight
  • Valency
  • Size
  • Chemical property
0 Comments
Correct Answer: A. Weight

Explanation:

Hydrogen is the lightest element in the periodic table. Its low weight makes ... Read More Details

5 Physical Chemistry MCQs

Why are radiations considered harmful?

  • Causes skin cancer
  • Causes anemia
  • Alters body tissue
  • Is unstable
0 Comments
Correct Answer: A. Causes skin cancer

Explanation:

Radiation is considered harmful because it can damage living cells and tissues, leading ... Read More Details

6 Physical Chemistry MCQs

A phonon is the quantum of __________?

  • Longitudinal wave
  • Elastic wave
  • Transverse wave
  • Electromagnetic wave
0 Comments
Correct Answer: B. Elastic wave

Explanation:

In solid-state physics and physical chemistry, a phonon is defined as the quantized ... Read More Details

7 Physical Chemistry MCQs

The concept of ensemble in statistical mechanics was introduced by __________?

  • Boltzmann
  • Gibbs
  • Carnot
  • Maxwell
0 Comments
Correct Answer: B. Gibbs

Explanation:

In statistical mechanics, the term ensemble refers to a large collection of hypothetical ... Read More Details

8 Physical Chemistry MCQs

Which molecule has the strongest London dispersion forces?

  • Hydrogen gas
  • Water
  • Bromine
  • Hydrochloric acid
0 Comments
Correct Answer: B. Water

Explanation:

London dispersion forces are a type of van der Waals force present in ... Read More Details

9 Physical Chemistry MCQs

Which of the following is the most viscous?

  • Glycerine
  • Water
  • Honey
  • Spirit
0 Comments
Correct Answer: C. Honey

Explanation:

Viscosity is a physical property of liquids that measures their resistance to flow. ... Read More Details

10 Physical Chemistry MCQs

Which of the following is not named after a scientist?

  • Pauli Exclusion Principle
  • Hund’s Rule
  • Aufbau Principle
  • Le-Chatelier’s Principle
0 Comments
Correct Answer: C. Aufbau Principle

Explanation:

In chemistry, many principles and rules are named after the scientists who discovered ... Read More Details

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