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JEE Main Ionic Equilibrium questions with solutions

Acids and bases, pH, buffers, hydrolysis and solubility product. 11 questions from our 2016–2025 JEE Main pattern papers, from the Class 11 Chemistry syllabus. Each has the answer and a full solution.

Also practise: Ionic Equilibrium for JEE Advanced

JEE Main 2025

HCN has Ka=1×10^-9. 55 mL of 0.2 M NaCN is mixed with 10 mL of 0.1 M HCl. The pH of the resulting solution is (nearest integer)JEE Main 2025 · medium

JEE Main 2024

Solid AgCl is shaken with 1.00 M aqueous NH3 at 298 K until equilibrium, forming [Ag(NH3)2]^+. Given Ksp(AgCl)=1.8×10^-10 and Kf=1.5×10^7 for…JEE Main 2024 · hard

JEE Main 2023

JEE Main 2022

The solubility product of Mg(OH)2 at 298 K is 4×10^-12 (log 2=0.30). The value of 10× (pH of its saturated aqueous solution) isJEE Main 2022 · medium

JEE Main 2021

Silver chloride dissolves in aqueous ammonia as AgCl+2NH3rightleftharpoons[Ag(NH3)2]^++Cl^-. Given Ksp(AgCl)=1.8×10^-10 and…JEE Main 2021 · hard

JEE Main 2020

A solution contains 0.05 M Mg^2+ and 0.10 M NH3 (Kb=1.8×10^-5). Ksp of Mg(OH)2=1.2×10^-11. The minimum concentration of NH4Cl needed to prevent…JEE Main 2020 · hard

JEE Main 2019

100 mL of 0.10 M acetic acid is mixed with 40 mL of 0.10 M NaOH. If pKa of acetic acid is 4.76, the pH of the resulting solution is nearest to (log 2…JEE Main 2019 · medium

JEE Main 2018

100 mL of 0.2 M NH3 (pKb=4.75) is mixed with 50 mL of 0.3 M HCl, and then 10 mL of 0.1 M NaOH is added. The pH of the final solution is approximatelyJEE Main 2018 · medium

JEE Main 2017

A 0.10 M solution of a weak monobasic acid HA has pH=3.0. To 100 mL of this solution, 75 mL of 0.10 M NaOH is added. The pH of the resulting solution…JEE Main 2017 · medium

JEE Main 2016

Solid AgNO3 is added slowly (no volume change) to a solution that is 0.010 M in Cl^- and 0.010 M in CrO4^2-. Given Ksp(AgCl)=1.8×10^-10 and…JEE Main 2016 · hard

Other Chemistry topics

Alcohols, Phenols, Ethers and Haloalkanes 16 Atomic Structure 12 Biomolecules and Polymers 14 Carbonyl Compounds, Carboxylic Acids and Amines 25 Chemical Bonding and Molecular Structure 14 Chemical Equilibrium 10 Chemical Kinetics 13 Chemical Thermodynamics 16 Coordination Compounds 18 Electrochemistry 18 General Organic Chemistry and Isomerism 13 Hydrocarbons 16 Mole Concept and Stoichiometry 12 Periodic Properties 9 Qualitative and Practical Chemistry 8 Redox Reactions and Titrations 9 Solutions, Solid State and Surface Chemistry 19 d- and f-Block Elements and Metallurgy 14 s-Block, p-Block Elements and Hydrogen 23