Physical Chemistry Mock Tests

The van't Hoff factor (i) for a compound that undergoes dimerization in solution is:

The equilibrium constant for the reaction A(g) ⇌ 2B(g) is 2.0 × 10⁻⁵ at 300 K and 1.6 × 10⁻³ at 400 K. The standard enthalpy change for the reaction is:

The standard Gibbs free energy change (ΔG°) for a cell reaction with E°cell = 0.30 V and n = 2 is: (F = 96500 C/mol)

The equilibrium constant Kp for the reaction N₂(g) + 3H₂(g) ⇌ 2NH₃(g) is 1.64 × 10⁻⁴ at 400 K. The value of Kc at this temperature is: (R = 0.0821 L·atm·mol⁻¹·K⁻¹)

The elevation in boiling point of a solution is directly proportional to:

For a first-order reaction, 75% of the reactant decomposes in 60 min. The half-life of the reaction is:

The pH of 0.001 M HCl solution is:

The standard Gibbs free energy change (ΔG°) for a reaction is negative. Which statement is correct?