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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

For the reaction 2HI → H₂ + I₂, how do the equilibrium constants Kp and Kc compare?

  • Kp > Kc
  • Kc > Kp
  • Kp = Kc
  • Kp ≤ Kc
0 Comments
Correct Answer: C. Kp = Kc

Explanation:

Equilibrium constants describe the ratio of products to reactants at equilibrium. Kc is ... Read More Details

2 Physical Chemistry MCQs

The amount of Zinc (at. wt = 65) necessary to produce 224 mL of H₂ gas by reaction with an acid is?

  • 0.065 g
  • 0.65 g
  • 6.5 g
  • 7.5 g
0 Comments
Correct Answer: D. 7.5 g

Explanation:

Zinc reacts with acids such as hydrochloric acid or sulfuric acid to liberate ... Read More Details

3 Physical Chemistry MCQs

Elements that emit natural radioactivity are known as ?

  • Radio elements
  • Active elements
  • Radioactive elements
  • Nuclear elements
0 Comments
Correct Answer: C. Radioactive elements

Explanation:

In nuclear chemistry, some elements naturally emit radioactive particles or radiation from their ... Read More Details

4 Physical Chemistry MCQs

A helium nucleus, comprising two protons and two neutrons with a charge of 2e, is called ?

  • Beta particle
  • Gamma particle
  • Alpha particle
  • Negative particle
0 Comments
Correct Answer: C. Alpha particle

Explanation:

In nuclear chemistry, an alpha particle is the nucleus of a helium atom. ... Read More Details

5 Physical Chemistry MCQs

Chromatography is used to separate _________ ?

  • Solution
  • Mixtures
  • Molecules
  • Atoms
0 Comments
Correct Answer: B. Mixtures

Explanation:

Chromatography is a widely used laboratory technique for separating mixtures into individual components. ... Read More Details

6 Physical Chemistry MCQs

The distance at which the attractive forces of hydrogen overcome the repulsive forces is __________?

  • 75.2 pm
  • 75.3 pm
  • 75.5 pm
  • 75.4 pm
0 Comments
Correct Answer: D. 75.4 pm

Explanation:

In physical chemistry, understanding interatomic forces is important for studying molecular structure and ... Read More Details

7 Physical Chemistry MCQs

The column of a manometer which faces the liquid is ?

  • Raised
  • Depressed
  • Compressed
  • Remains same
0 Comments
Correct Answer: B. Depressed

Explanation:

A manometer is an instrument used to measure pressure differences between a gas ... Read More Details

8 Physical Chemistry MCQs

The process used to separate insoluble particles from liquids is called ___________?

  • Drying
  • Filtration
  • Sieving
  • Extraction
0 Comments
Correct Answer: B. Filtration

Explanation:

Filtration is a common laboratory process used to separate insoluble solid particles from ... Read More Details

9 Physical Chemistry MCQs

The effective volume in gas calculations is usually taken for how many moles of gas?

  • 2 moles of gas
  • 1 mole of gas
  • 5 moles of gas
  • 3 moles of gas
0 Comments
Correct Answer: B. 1 mole of gas

Explanation:

In physical chemistry, the concept of effective volume is commonly used in gas ... Read More Details

10 Physical Chemistry MCQs

A scale used to measure the hydrogen ion concentration in a solution is known as ?

  • Thermometer
  • Viscometer
  • pH Scale
  • Stagmometer
0 Comments
Correct Answer: C. pH Scale

Explanation:

The pH scale is a scientific tool used to measure the hydrogen ion ... Read More Details

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