List of top Physical Chemistry Questions

The Maxwell-Boltzmann distribution $f(v_x)$ of one-dimensional velocities $v_x$ at temperature T is [Given: A is a normalization constant such that $ \int_{-\infty}^{\infty} f(v_x) dv_x = 1$, and $k_B$ is the Boltzmann constant]

The potential for a particle in a one-dimensional box is given as:
$V(x)=0$ for $0≤x≤L,$ and $V(x) = ∞$ elsewhere.
The locations of the internal nodes of the eigenfunctions $\Psi _n(x), n≥2$, are
[Given: m is an integer such that 0<m<n]

The number of CO stretching bands in the infrared spectrum of $Fe(CO)_5$ is

The standard Gibbs free energy change for the reaction
$H_2O (g) → H_2 (g) + ½ O_2(g)$ at 2500 K is $+118 kJ mol^{-1}$
The equilibrium constant for the reaction is
[Given: $R= 8.314 J K^{-1} mol^{-1}$]

Among the following, the reaction(s) that favor(s) the formation of the products at 25 °C is/are

The reaction involve(s)

For an N-atom nonlinear polyatomic gas, the constant volume molar heat capacity Cv,m has the expected value of 3(N-1)R, based on the principle of equipartition of energy. The correct statement(s) about the measured value of Cv,m is/are

The conversion of $ICl$ to $ICl^+$ involve(s)

The common point defect(s) in a solid is/are

The number of signals observed in the $^1H NMR$ spectrum of the compound

is _________.

The d spacing for the first-order X-ray ($\lambda$= 1.54 Å) diffraction event of metallic iron (fcc) at $2\theta= 20.2°$ is _______.Å. (round off to three decimal places)

The volume fraction for an element in an fcc lattice is ____________ . (round off to two decimal places)

steady current of 1.25 A is passed through an electrochemical cell for 1.5 h using a 12 V battery. The total charge, Q, drawn during this process is __________ Coulombs. (round off to the nearest integer)

Iron is extracted from its ore via the reaction
$Fe_2O_3, + 3 CO→ 2 Fe + 3CO_2$
The volume of CO (at STP) required to produce 1 kg of iron is ________liters. (round off to the nearest integer)
[Given: Atomic wt. of Fe = 56; assume STP to be 0 °C and 1 atm]

A galvanic electrochemical cell made of Zn²⁺/Zn and Cu²⁺/Cu half-cells produces 1.10 V at 25°C. The ratio of |Zn²⁺| to |Cu²⁺| is maintained at 1.0. The ΔG° for the reaction when 1.0 mol of Zn gets dissolved is____kJ. (round off to the nearest integer)
[Given: Faraday's constant = 96485 C mol^-1]

At constant volume, 1.0 kJ of heat is transferred to 2 moles of an ideal gas at 1 atm and 298 K. The final temperature of the ideal gas is ____K. (round off to one decimal place)
[Given: R = 8.314 J K^-1 mol^-1]

Two close lying bands in a UV spectrum occur at 274 nm and 269 nm. The magnitude of the energy gap between the two bands is ____cm^-1. (round off to the nearest integer)

The pH of an aqueous buffer prepared using CH3COOH and CH3COO Na⁺ is 4.80.
The quantity \(\frac{[CH_3COO^-]-[CH_3COOH]}{[CH_3COOH]}\) is _____. (round off to three decimal places)
[Given: pK_a of CH₃COOH in water is 4.75]

At constant temperature, 6.40 g of a substance dissolved in 78 g of benzene decreases the vapor pressure of benzene from 0.125 atm to 0.119 atm. The molar mass of the substance is ____g mol^-1. (round off to one decimal place)
[Given: Mol. wt. of benzene = 78 g mol^-1]

The value of R in energy of activation is

Which is NOT the colligative property?
(A)Depression of freezing point
(B) Elevation of boiling point
(C)Elevation of vapour pressure
(D) Osmotic pressure
Choose the correct one of the following:

Which among the following cations has the lowest molar ionic conductivity in water at infinite dilution and at 25 degree centigrade?

The properties of solutions containing surface active agents change sharply over a narrow concentration range and are called as

Which of the following method is used for the determination of osmotic pressure?

Which of the following is NOT an intensive property?