Physical Chemistry MCQ (Multiple Choice Questions)

Here are 1000 MCQs on Physical Chemistry (Chapterwise).

1. How do electrons flow in the galvanic cell from anode to cathode?
a) Salt-bridge
b) External electrical circuit
c) Movement of ions
d) Does not flow
View Answer

Answer: a
Explanation: In galvanic cell, electrons flow from anode to cathode through the salt bridge. Salt bridge is a tube which provides electrical contact between two solutions.

2. What is molecular spectroscopy?
a) No change in energy
b) Change in energy at visible level
c) Change in energy at molecular level
d) Change in energy at atomic level
View Answer

Answer: c
Explanation: Molecular spectroscopy involves the interaction of electromagnetic radiation with materials in order to produce an absorption pattern from which structural or compositional information can be deduced. This also involves change in energy at molecular level.

3. What is a galvanic cell?
a) Electrical energy is converted into heat
b) Chemical energy is converted into electricity
c) Chemical energy is converted into heat
d) Electrical energy is converted into chemical energy
View Answer

Answer: b
Explanation: Galvanic cell is an electrochemical cell. It consists of two metal rods immersed in a solution containing its own ions. It is used to convert chemical energy into electricity.

4. What is the type of many crystalline semi-conductors?
a) Edge centered cubic
b) Simple cubic
c) Body centered cubic
d) Face centered cubic
View Answer

Answer: d
Explanation: Many of the semi-conductors are crystals of the type face centered cubic or FCC. FCC is a type of atomic arrangement and is relatively tightly packed with atomic packing factor 0.74. FCC is defined as a cubic lattice with the face positions fully equivalent to each of the eight corners.

5. Which of the following intermolecular forces are the strongest?
a) Dispersion Forces
b) Ionic bonds
c) Dipole-Dipole Interaction
d) Intermolecular H-bonding
View Answer

Answer: b
Explanation: The increasing order of the strength of intermolecular forces is dispersion forces < dipole-dipole interaction < intermolecular H-bonding < ionic bonds. Therefore, ionic bonds have the strongest intermolecular forces of attraction.

6. Which model of atom signifies the existence of atomic spectra?
a) John Dalton’s model of the atom
b) Rutherford’s model of the atom
c) Bohr’s model of the atom
d) Plum pudding model of the atom
View Answer

Answer: c
Explanation: The existence of the atomic spectra is support for Bohr’s model of the atom. It suggests that the atomic spectra of atoms are produced by electrons gaining energy from some source, jumping up to a higher energy level, then immediately drop back to a lower energy level and emitting the energy difference between the two energy levels.

7. Which of the following is an alkali?
a) Helium
b) Sodium
c) Chlorine
d) Neon
View Answer

Answer: b
Explanation: Neon (2s22p6) and Helium (2s2) both have inert gas electron configuration, thus, both are inert gases. Chlorine (3s23p5) has one electron short of a closed shell, thus, chlorine is a halogen. Sodium (3s1) a single electron outside the closed shell, therefore, sodium is an alkali.

8. In the variational method, what parameter should be varied to solve for energy of a helium atom?
a) Bohr’s radius
b) Permittivity of free space
c) Effective nuclear charge
d) Effective energy
View Answer

Answer: c
Explanation: The parameters to be varied is effective nuclear charge Z’, since this needs to be plugged into the energy equation to solve for minimum energy. Moreover, this is the only variable other than E’. If E’ is used as the variable parameter, there will be no equation to plug this into to solve for minimum energy.

9. The Schrodinger equation is a mathematical representation for waves of which of the following fundamental balances of nature?
a) Equilibrium Balance
b) Momentum Balance
c) Force Balance
d) Energy Balance
View Answer

Answer: d
Explanation: The Schrodinger Equation equates energy for a wave at a certain state. The left-hand side includes all components of energy (such as potential, kinetic, and others) and the right-hand side is the total energy of a given state.

10. What is the equation of an ideal gas?
a) P V = m R T
b) P V = n K T
c) P V = K
d) P V = n R T
View Answer

Answer: c
Explanation: The ideal gas equation is P V = n R T, where R is universal gas constant. It is used to calculate either the pressure, volume or number of moles.

11. What is the unit of Specific Heat Capacity?
a) Joule / K
b) Joule / (grams. K)
c) Joule / kg
d) Joule / (mole. K)
View Answer

Answer: b
Explanation: Specific Heat Capacity, represented by symbol C or c, is how much energy is needed to increase the temperature of one gram of a substance by 1 degree centigrade or 1 K.

12. What is the main principle behind the Poisson-Boltzmann equation?
a) Thermodynamic equilibrium
b) Quantum mechanics
c) Gas behavior
d) Ionic interactions in solutions
View Answer

Answer: c
Explanation: The Poisson-Boltzmann equation is based on the principle of describing the distribution of ions around a charged molecule or surface in a solution, specifically focusing on the electrostatic interactions between ions. It is particularly useful in understanding ionic behavior in electrolyte solutions and near charged surfaces.

Chapterwise Multiple Choice Questions on Physical Chemistry

Physical Chemistry MCQ - Multiple Choice Questions and Answers

Our 1000+ MCQs focus on all topics of the Physical Chemistry subject, covering 100+ topics. This will help you to prepare for exams, contests, online tests, quizzes, viva-voce, interviews, and certifications. You can practice these MCQs chapter by chapter starting from the 1st chapter or you can jump to any chapter of your choice.

1. Physical Chemistry MCQ on Thermodynamics

The section contains multiple-choice questions and answers on basic chemistry, thermodynamics definition and types, gas equations, kinetic gas theory, phase behavior of binary system, fundamental laws of thermodynamics, ideal gases, heat capacities, phase equilibrium, real gases, isotherms and critical conditions, chemical equilibrium, and thermodynamics reactions.

  • Basic Chemistry
  • Thermodynamics Definition and Types
  • Gas Equations
  • Kinetic Gas Theory
  • Phase Behavior of Binary System
  • Fundamental Laws of Thermodynamics
  • Ideal Gases
  • Heat Capacities
  • Phase Equilibrium
  • Real Gases, Isotherms and Critical Conditions
  • Chemical Equilibrium
  • Thermodynamics Reactions
  • 3. Quantum Chemistry MCQ on Atomic Structure

    The section contains MCQs on topics related to quantum theory, including heisenberg uncertainty principle, schrodinger equation, quantum operators, superposition, spectra for hydrogen-like atoms, eigenfunctions, orbital angular momentum, electron spin, variational method, helium atom, pauli exclusion principle, hartree-fock self-consistent field method, periodic table, ionization energy, atomic term symbols, and more.

  • Schrodinger Equation for Hydrogen Like Atoms
  • Spectrum for Hydrogen Like Atoms
  • Spectrum for Hydrogen Like Atoms – Set 2
  • Eigenfunctions and Probability Densities for Hydrogen Like Atoms
  • Orbital Angular Momentum of Hydrogen Like Atoms
  • Electron Spin
  • Variational Method
  • Variational Method – Set 2
  • Helium Atom
  • Pauli Exclusion Principle
  • Hartree-Fock Self Consistent Field Method
  • Periodic Table and Aufbau Principle
  • Periodic Table and Aufbau Principle – Set 2
  • Ionization Energy and Electron Affinity
  • Angular Momentum of Many-Electron Atoms
  • Atomic Term Symbols
  • Atomic Spectra and Selection Rules
  • Atomic Units
  • 4. Molecular Electronic Structure

    The section contains Quantum Chemistry MCQs on hydrogen molecule ion, energy calculation, electronic configurations of homonuclear diatomic molecules, valence bond method for polyatomic atoms, Huckle molecular orbital theory, molecular electronic structure, intermolecular forces, hydrogen bonds, hybrid orbitals, and band theory of solids.

  • Hydrogen Molecule Ion
  • Calculation of the Energy of a Hydrogen Molecule Ion
  • Electronic Configurations of Homonuclear Diatomic Molecules
  • Electronic Structure of Polyatomic Atoms: Valence Bond Method
  • Huckle Molecular Orbital Theory
  • Molecular Electronic Structure
  • Intermolecular Forces
  • Hydrogen Bonds, Hybrid Orbitals, and Band Theory of Solids
  • Hydrogen Bonds, Hybrid Orbitals, and Band Theory of Solids – Set 2
  • Hydrogen Bonds, Hybrid Orbitals, and Band Theory of Solids – Set 3
  • 5. Physical Chemistry Questions on Symmetry

    The section contains questions and answers on symmetry elements and symmetry operations.

  • Symmetry Elements and Symmetry Operations
  • 6. MCQ on Rotational and Vibrational Spectroscopy

    The section contains MCQs on spectroscopy.

  • Spectroscopy
  • Spectroscopy – Set 2
  • 7. Kinetics

    The section contains multiple choice questions and answers on kinetics, including definitions and types, kinetics of more complex multistep chemical reactions, and activation energy.

  • Kinetics Definition and Types
  • Kinetics of More Complex Multistep Chemical Reactions
  • Kinetics – Activation Energy
  • 8. Physical Chemistry Multiple Choice Questions on Electrochemistry

    The section contains questions and answers on electrical conductivity, weak electrolytes, inter-ionic interactions, Poisson-Boltzmann formalism, electrochemical potential, and galvanic cells.

  • Electrical Conductivity
  • Electrical Conductivity of Weak Electrolytes
  • Inter-Ionic Interactions
  • Poisson Boltzmann Formalism
  • Electrochemical Potential and Electrochemical Cells
  • Galvanic Cell
  • If you would like to learn "Physical Chemistry" thoroughly, you should attempt to work on the complete set of 1000+ MCQs - multiple choice questions and answers mentioned above. It will immensely help anyone trying to crack an exam or an interview.

    Wish you the best in your endeavor to learn and master Physical Chemistry!

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