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
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
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
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
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
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
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
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
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
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
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
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
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
- Part 1: Thermodynamics
- Part 2: Quantum Chemistry
- Quantum Theory
- Atomic Structure
- Molecular Electronic Structure
- Symmetry
- Rotational and Vibrational Spectroscopy
- Part 3: Kinetics
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.
2. MCQ on Quantum Theory
The section contains questions on quantum theory, including topics such as heisenberg uncertainty principle, schrodinger equation, quantum operators, superposition, and various quantum phenomena.
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.
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.
5. Physical Chemistry Questions on Symmetry
The section contains questions and answers on symmetry elements and symmetry operations.
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6. MCQ on Rotational and Vibrational Spectroscopy
The section contains MCQs on spectroscopy.
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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.
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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.
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