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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

The sum of protons and neutrons in an atom gives which number?

  • Nucleon number
  • Mass number
  • Atomic number
  • Both A and B
0 Comments
Correct Answer: D. Both A and B

Explanation:

Atoms are made of protons, neutrons, and electrons. Protons and neutrons are located ... Read More Details

2 Physical Chemistry MCQs

The reciprocal of the coefficient of viscosity is called __________?

  • Density
  • Specific gravity
  • Fluidity
  • Absorbance
0 Comments
Correct Answer: C. Fluidity

Explanation:

In physical chemistry, the viscosity of a fluid measures its resistance to flow. ... Read More Details

3 Physical Chemistry MCQs

If the volume of a gas triples at constant temperature, what happens to its pressure?

  • 3P
  • P ÷ 3
  • 3P ÷ T
  • 6P
0 Comments
Correct Answer: B. P ÷ 3

Explanation:

According to Boyle’s Law, the pressure of a fixed mass of gas at ... Read More Details

4 Physical Chemistry MCQs

A theoretical connection between quantum mechanics and thermodynamics is called ?

  • Electrochemistry
  • Matrix mechanics
  • Statistical thermodynamics
  • Spectroscopic analysis
0 Comments
Correct Answer: C. Statistical thermodynamics

Explanation:

Statistical thermodynamics is a branch of physical chemistry that provides a theoretical connection ... Read More Details

5 Physical Chemistry MCQs

Which of the following gases shows the most ideal behaviour at 0 °C?

  • H₂
  • CH₄
  • He
  • NH₃
0 Comments
Correct Answer: C. He

Explanation:

The concept of an ideal gas is based on two key assumptions: first, ... Read More Details

6 Physical Chemistry MCQs

In a closed vessel, a gas is heated from 300 K to 600 K. The kinetic energy becomes ?

  • Double
  • Same
  • Half
  • Four times
0 Comments
Correct Answer: A. Double

Explanation:

According to the kinetic theory of gases, the average kinetic energy of gas ... Read More Details

7 Physical Chemistry MCQs

At constant pressure, at what temperature will the volume of a gas become twice its volume at 0 °C?

  • 546 °C
  • 546 K
  • 200 °C
  • 273 K
0 Comments
Correct Answer: B. 546 K

Explanation:

Charles’ Law describes the relationship between the volume of a gas and its ... Read More Details

8 Physical Chemistry MCQs

The density of a gas is 1.964 g dm⁻³ at 273 K and 76 cm Hg. The gas is ?

  • CH₄
  • CO₂
  • C₂H₄
  • Xe
0 Comments
Correct Answer: B. CO₂

Explanation:

The relationship between density, molar mass, and the ideal gas law is a ... Read More Details

9 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

10 Physical Chemistry MCQs

How much heat energy is produced 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:

The human body produces energy by metabolizing macronutrients such as carbohydrates, proteins, and ... Read More Details

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