NEET Chemistry - MCQ Practice Questions

Which of the following is the correct expression for the equilibrium constant (Kc) for the reaction: N₂(g) + 3H₂(g) ⇌ 2NH₃(g)?

What is the pH of a 0.01 M HCl solution?

The rate constant of a first-order reaction is 0.693 s⁻¹. What is the half-life of this reaction?

For the reaction: 2A + B → C, if the rate law is Rate = k[A]²[B], what is the overall order of the reaction?

What is the relationship between ΔG, ΔH, and ΔS?

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?

For the reaction: N₂O₄(g) ⇌ 2NO₂(g), at equilibrium at 25°C, Kp = 0.15 atm. If initial pressure of N₂O₄ is 1 atm and x atm of N₂O₄ dissociates, what is the value of x?

For a cell reaction, if E°cell = 1.5 V at 25°C, what is ΔG° for the reaction? (F = 96500 C/mol, R = 8.314 J/(mol·K))

For a weak acid HA with Ka = 1.0 × 10⁻⁵, if the degree of dissociation (α) is 0.01, what is the initial concentration of the acid?

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?

For a second-order reaction, if the rate constant k = 0.5 L·mol⁻¹·s⁻¹ and initial concentration [A]₀ = 2 M, what is the time required for the concentration to reduce to 0.5 M?

At 298 K, the solubility product of AgCl is 1.8 × 10⁻¹⁰. What is the solubility of AgCl in mol/L?

Which of the following exhibits the highest lattice energy?