NEET Chemistry - MCQ Practice Questions

In electrochemistry, what does the cell potential (E°cell) indicate?

For a reversible adiabatic process of an ideal gas, which statement is correct?

The standard cell potential for a cell is E° = 1.10 V. Calculate ΔG° (F = 96500 C/mol, n = 2):

For the reaction: A → B, if the order is 2 and rate constant k = 0.5 L·mol⁻¹·s⁻¹, find the half-life when initial concentration is 2 M.

What is the entropy change when 18 g of ice at 273 K is converted to water at 273 K? (ΔfusH = 6 kJ/mol)

A buffer solution contains 0.1 M acetic acid and 0.1 M sodium acetate. If Ka = 1.8 × 10⁻⁵, calculate the pH:

The osmotic pressure of a solution is given by π = iMRT. If 0.1 M glucose solution has osmotic pressure 2.46 atm at 273 K, what is the van't Hoff factor?

For the exothermic reaction: 2SO₂(g) + O₂(g) ⇌ 2SO₃(g), increasing temperature will:

A buffer solution is prepared by mixing 100 mL of 0.1 M CH₃COOH and 100 mL of 0.1 M CH₃COONa. The pKa of acetic acid is 4.74. What is the pH?

In a galvanic cell, at the cathode:

At 25°C, for the reaction: Cu²⁺(aq) + Zn(s) → Cu(s) + Zn²⁺(aq), E° = 1.1 V. What is ΔG°? (F = 96500 C/mol)

The solubility product of AgCl at 25°C is 1.8 × 10⁻¹⁰. What is the solubility in mol/L?

For a spontaneous process at constant temperature and pressure:

An endothermic reaction has ΔH = +50 kJ/mol. For this reaction to be spontaneous at all temperatures, which condition must be satisfied?

The rate constant for a reaction doubles when temperature increases from 300 K to 310 K. What is the approximate activation energy (Ea)?

For the reaction: N₂O₄(g) ⇌ 2NO₂(g), if Kp = 0.5 atm at 298 K, what is Kc at the same temperature?

What is the order of the reaction if its half-life is independent of initial concentration?

The cell potential (E°cell) for a reaction is -0.5 V. Which statement is correct?

A solution containing 0.5 mol of a non-volatile, non-electrolyte solute in 1 L of water shows a freezing point of -0.93°C. What is the cryoscopic constant (Kf) of water? (Tf of pure water = 0°C)

The osmotic pressure of a solution is 10 atm at 27°C. What is the molarity of the solution?