Chemistry - Chemical Equilibrium
Practise 13 WBJEE previous year questions on Chemical Equilibrium, compiled from papers spanning 2009 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty WBJEE tests.
Chemical Equilibrium has been asked in 13 of the 18 years of WBJEE papers analysed (2009–2026), with 13 questions in all. 46% of them were easy, 54% moderate and 0% tough. Most of its questions came from 2026, with 1 question that year. In the last three years (2024–2026) it had 2 questions across 3 papers, about 0.7 per paper.
The chapter's 2 topics are not weighted equally: Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application (12 questions, 92%) and Le chatelier's principle (1 question, 8%) have been asked the most. Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application has also led over the last five years, with 2 questions.
- 1For the reaction , variation of concentration is plotted against time as shown below. Which of the following statements is true?2026Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 2Consider the following gas phase dissociation, with equilibrium constant at a particular temperature and at pressure . The degree of dissoci2025Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 3The equilibrium constant for the reaction is at . In presence of a catalyst the equilibrium is attained 10 times faster. Therefore, the equi2021Le chatelier's principle
- 4The equilibrium constant for the following reactions are given at The equilibrium constant for the reaction at is2020Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 5In the equilibrium, if at a given temperature the concentrations of the reactants are increased, the value of the cquilibrium constant, , wi2019Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 6The following equilibrium constants are given The equilibrium constant for the oxidation of 2 mole of to give NO is2018Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 7Equilibrium constants for the following reactions at are given The equilibrium constant for the reaction? at will be2017Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 8Which of the following plots represent an exothermic reaction?2016Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 9For the reaction, the value of is . The equilibrium constant value for the reaction at that temperature is is gas constant2015Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 10In a reversible chemical reaction at equilibrium, if the concentration of any one of the reactants is doubled, then the equilibrium constant2012Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 11If the equilibrium constants of the following equilibria \( {SO}_2+ {1}{2} {O}_2 {SO}_3 { and } 2 {SO}_3 2 {SO}_2+ {O}_2\) are given by \( {2011Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 12Calculate for the reversible process given below if and2010Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 13For the reaction , if we write , then becomes2009Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
Frequently Asked Questions
1.How many questions are available for Chemical Equilibrium?
This chapter includes 13 questions compiled from WBJEE papers spanning 2009 to 2026.
2.Are these questions only from WBJEE, or from other exams too?
These are WBJEE questions specifically for the Chemical Equilibrium chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.
3.Is Chemical Equilibrium an important chapter for WBJEE Chemistry?
Chemical Equilibrium has appeared in 13 of the 18 years of WBJEE papers covered here, with 13 questions across 13 papers - about one per paper it appears in.
4.What is the difficulty level of Chemical Equilibrium questions in WBJEE?
Of the 13 questions analysed for this chapter, 46% are easy, 54% moderate and 0% tough. 2026 had the most, with 1 question.
5.Which topics in Chemical Equilibrium should I focus on?
These topics have carried the most weightage in Chemical Equilibrium:
- Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application - 12 questions (92%)
- Le chatelier's principle - 1 question (8%)
6.Is Chemical Equilibrium's weightage in WBJEE going up or down?
Across all 13 papers analysed, Chemical Equilibrium has averaged about 1.0 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.7 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.