NEET Chemistry - MCQ Practice Questions

A buffer solution is prepared by mixing 100 mL of 0.1 M acetic acid (CH₃COOH) and 100 mL of 0.1 M sodium acetate (CH₃COONa). Using Henderson-Hasselbalch equation, if Ka = 1.8 × 10⁻⁵, what is the pH?

For a reversible reaction at equilibrium, if Kc = 4 at 25°C, what is the relationship between forward and reverse rate constants?

Which of the following will shift the equilibrium of the reaction CO(g) + H₂O(g) ⇌ CO₂(g) + H₂(g), ΔH = -41 kJ/mol to the right?

For a spontaneous process, which of the following is always true?

A reaction has Ea (forward) = 50 kJ/mol and Ea (reverse) = 35 kJ/mol. What is ΔH for this reaction?

The vapour pressure of water at 25°C is 23.76 mmHg. What is the mole fraction of ethanol in an ethanol-water solution if its vapour pressure is 20.88 mmHg? (Assume ideal solution and pure ethanol vapour pressure = 58.9 mmHg at 25°C)

Which statement correctly describes the colligative properties?

A solution of HCl has pH 2. What is the degree of dissociation of HCl if initial concentration is 0.1 M?

A gas mixture contains 2 moles of O₂ and 3 moles of N₂. At total pressure of 5 atm, what is the partial pressure of O₂?

Which colligative property depends on the nature of solute as well as its concentration?

For a buffer solution containing equal molar amounts of acetic acid and sodium acetate, if Ka = 1.8 × 10⁻⁵, what is the pH?

An ideal gas undergoes isothermal compression from 10 L to 5 L at constant temperature. The work done ON the gas is:

The Born-Landé equation is used to calculate which property?

For the reaction: PCl₅(g) ⇌ PCl₃(g) + Cl₂(g), if initial pressure of PCl₅ is 1 atm and degree of dissociation is 0.4, what is Kp at constant total pressure?

The standard entropy change (ΔS°) for vaporization of water at 100°C and 1 atm is 108.8 J/(mol·K). What is ΔG° at 100°C?

For a weak acid HA with concentration 0.1 M and Ka = 4 × 10⁻⁶, the degree of ionization is:

In a galvanic cell, if ΔG° = -95.5 kJ/mol and n = 2, what is E°cell? (F = 96500 C/mol)

The rate of reaction doubles when temperature increases from 300 K to 310 K. Calculate the activation energy (Ea) using Arrhenius equation.

For the equilibrium PCl₅(g) ⇌ PCl₃(g) + Cl₂(g), Kc = 1.8 at 298 K. If initial concentration of PCl₅ is 1 M, find [PCl₃] at equilibrium when dissociation is 30%.

The hydration enthalpy of an ion depends on which of the following factors?