List of top Physical Chemistry Questions

For the following compound

the number of signals expected in the 1H NMR spectrum is _________.

The stretching frequency of CO in H₃B.CO is

Consider the exothermic chemical reaction O₂(𝑔)+2H₂(𝑔) ⇌ 2H₂O(𝑔) at equilibrium in a closed container. The correct statement(s) is/are

For one mole of an ideal gas, the correct statement(s) is/are
[𝑈=internal energy; 𝑉= volume; 𝑇=temperature; 𝑃=pressure]

The correct assumption(s) required to derive Langmuir adsorption isotherm is/are

B₂ and C₂, respectively, are

A system undergoes one clockwise cycle from point X back to point X as shown in the figure below:

The correct statement about this process is

If nitrogen and oxygen gases are at the same temperature, the correct statement according to the kinetic theory of gases is

Consider photoelectric effect. The number of incident photons is the same for all frequencies. The plot that best describes the dependence of the number of photoelectrons (n) emitted as a function of the incident light frequency (ν) is

In the cell reaction
P⁺(𝑎𝑞)+Q(𝑠)→P(𝑠)+Q⁺(𝑎𝑞) 
the EMF of the cell, 𝐸_{𝑐𝑒𝑙𝑙} is zero. The standard EMF of the cell, 𝐸^𝑜_{𝑐𝑒𝑙𝑙} is 
[Given: 
Activities of all solids are unity. 
Activity of P⁺(𝑎𝑞) is 2 M. Activity of Q⁺(𝑎𝑞) is 1 M. 
𝑅 = universal gas constant; 𝑇 = temperature; 𝐹 = Faraday constant]

The shape of SCN¯ is

Wavelength of X-rays used in a diffraction experiment is 1.54 Å. X-rays are diffracted from a set of planes with an interplanar spacing of 1.54 Å. Then the angle θ (in degrees) corresponding to the first-order Bragg diffraction is

For the reaction

if the concentration of KCN is increased four times, then the rate of the reaction would be

In the EPR spectrum of an aqueous solution of VOSO₄ at room temperature, the total number of hyperfine splitting signals is

Critical micellar concentration of a surfactant is 0.008 M in water at 25 °C. If the aggregation number of the micelles is 80, the concentration of the micelles (in M) present in 0.088 M aqueous solution of the surfactant at 25 °C is

The following figure shows an experimental liquid-liquid phase diagram of phenol and water at the vapor pressure of the system. The total amount of phenol and water (in mol) present in the phenol-rich phase when 5 mol of water was shaken with 5 mol of phenol at 40 °C is _______.

(rounded off to one decimal place)

The correct statement(s) related to an ensemble is (are) :

The wave function of a particle in a cubic box (of side L) is given by
\(\psi(x,y,z)=\sqrt{32/L^3}\sin\frac{\pi x}{L}\cos\frac{\pi x}{L}\sin\frac{2\pi y}{L}\sin\frac{\pi z}{L.}\).
The ratio of the energy of the state corresponding to the above wave function to the ground state energy is ________.
(rounded off to the nearest integer)

Φ₁ and Φ₂ are normalised eigenfunctions of a Hermitian operator.
|Ψ〉 = 3i |Φ₁〉 + 2|Φ₂〉 and |X〉 = -2i |Φ₁〉 + 5 |Φ₂〉
The value of 〈Ψ|X〉 + 〈X|Ψ〉 is _______.
(rounded off to the nearest integer)

The turnover frequency (in h^-1) of a reaction where 5 mol% of a catalyst is required for 90% conversion in 3 h is ______.
(rounded off to the nearest integer)

Among the following, the correct statement(s) is (are) :

ΔS° (in J mol^-1 K^-1) for the given reaction at 298 K is ________.
[Cu(H₂O)6]²⁺ + en ⇌ [Cu(H₂O)₄(en)]²⁺ + 2H₂O
(Given: log K₁ = 10.6, where K₁ is the equilibrium constant. ΔH° =-54 kJ mol^-1 and R = 8.314 J mol^-1 K^-1)
(rounded off to two decimal places)

Among the following, the correct statement(s) is (are) :

Consider the following reaction sequence where M and N are the major products.
The correct option(s) is (are)

If q_t and Q_t,m are the molecular and molar translational partition functions of X₂, respectively, then In(Q_t,m) =
(N is the Avogadro number)