JEE Chemistry

Ionic Equilibria & pH: JEE Questions & Solutions

14 previous-year JEE Chemistry questions on Ionic Equilibria & pH, each with a worked step-by-step solution.

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Previous-year questions

  1. 01The first and second ionization constants of H₂X are 2.5 × 10⁻⁸ and 1.0 × 10⁻¹³ respectively. The concentration of X²⁻ in 0.1 M H₂X…NVAMediumJEE 2026
  2. 02Consider the dissociation equilibrium of the following weak acid: HA ⇌ H⁺(aq) + A⁻(aq) If the pKₐ of the acid is 4, then the pH of a 10 mM…NVAEasyJEE 2026
  3. 03If 1 mM solution of ethylamine produces pH = 9, then the ionization constant (K_b) of ethylamine is 10^(-x). The value of x is (nearest…NVAEasyJEE 2025
  4. 04pH of water is 7 at 25^° C. If water is heated to 80^° C, its pH will:MCQEasyJEE 2025
  5. 05A weak acid HA has degree of dissociation x. Which option gives the correct expression of pH - pKₐ?MCQEasyJEE 2025
  6. 06The pH of a 0.01 M weak acid HX (Kₐ=4 × 10⁻¹⁰) is found to be 5. Now the acid solution is diluted with excess of water so that the pH of…NVAMediumJEE 2025
  7. 07x mg of Mg(OH)₂ (molar mass = 58) is required to be dissolved in 1.0 L of water to produce a pH of 10.0 at 298 K. The value of x is mg.…NVAEasyJEE 2025
  8. 08An aqueous solution of HCl with pH 1.0 is diluted by adding equal volume of water (ignoring dissociation of water). The pH of HCl solution…MCQEasyJEE 2025
  9. 09When the hydrogen ion concentration [H⁺] changes by a factor of 1000, the value of pH of the solution:MCQEasyJEE 2023
  10. 10Millimoles of calcium hydroxide required to produce 100 mL of the aqueous solution of pH = 12 is x × 10⁻¹. The value of x is (Nearest…NVAEasyJEE 2023
  11. 11600 mL of 0.01 M HCl is mixed with 400 mL of 0.01 M of H₂SO₄. The pH of the mixture is × 10⁻². (Nearest integer) Given: log 2 = 0.30, log 3…NVAMediumJEE 2023
  12. 12Incorrect statement for the use of indicators in acid-base titration:MCQEasyJEE 2023
  13. 13The titration curve of a weak acid against a strong base, using phenolphthalein as the indicator, is shown below. Given: K_phenolphthalein…NVAMediumJEE 2023
  14. 14Which of the following statement(s) is/are correct? (A) The pH of 1 × 10⁻⁸ M HCl solution is 8. (B) The conjugate base of H₂PO₄⁻ is HPO₄²⁻.…MCQEasyJEE 2023

Frequently asked questions

Our bank has 14 previous-year JEE Chemistry questions tagged to Ionic Equilibria & pH, drawn from JEE papers between 2023 and 2026, including 2 from 2026 alone. Each comes with a full step-by-step solution.

Ionic Equilibria & pH is rated Advanced overall for JEE Chemistry. The PYQs on this page break down as 10 easy, 4 medium.

Of the 14 previous-year questions on Ionic Equilibria & pH, 6 are multiple-choice (MCQ) and 8 are numerical-value (NVA) questions.

Based on recent paper analysis, Ionic Equilibria & pH is worth about 1 mark in JEE Main. It sits in Equilibrium, a Class 11 Chemistry chapter.

More Equilibrium topics

Equilibrium Basics22Solubility Product10Le Chatelier's Principle7Buffer Solutions6Hydrolysis of Salts2

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