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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

What is the shape of the triiodide ion (I₃⁻)?

  • Trigonal bipyramidal
  • Linear
  • Square bipyramidal
  • Both A and C
0 Comments
Correct Answer: B. Linear

Explanation:

The triiodide ion (I₃⁻) is a polyatomic ion consisting of three iodine atoms. ... Read More Details

2 Physical Chemistry MCQs

The hybrid orbitals of BeCl₂ are of type __________?

  • sp²
  • sp³
  • sp
  • dsp²
0 Comments
Correct Answer: C. sp

Explanation:

Beryllium chloride (BeCl₂) is a linear molecule in which beryllium is bonded to ... Read More Details

3 Physical Chemistry MCQs

Molecular Orbital Theory is also called __________?

  • Bonding Theory
  • Band Theory
  • Antibonding Theory
  • π and σ Bonding Theory
0 Comments
Correct Answer: C. Antibonding Theory

Explanation:

The Molecular Orbital (MO) Theory explains how electrons are distributed in molecules. According ... Read More Details

4 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

5 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

6 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

7 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

8 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

9 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

10 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

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