Chemistry - Chemical Equilibrium
Practise 12 NEST (NISER) previous year questions on Chemical Equilibrium, compiled from papers spanning 2015 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 NEST (NISER) tests.
Chemical Equilibrium has been asked in 9 of the 16 years of NEST (NISER) papers analysed (2011–2026), with 12 questions in all. 8% of them were easy, 83% moderate and 8% tough. Most of its questions came from 2024, with 2 questions that year. In the last three years (2024–2026) it had 4 questions across 4 papers, about 1 per paper.
The chapter's 2 topics are not weighted equally: Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application (9 questions, 75%) and Le chatelier's principle (3 questions, 25%) 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 5 questions. Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application has produced the most tough questions (1).
- 1Consider the following chemical reactions performed at identical temperature and volume: Experiment I: Experiment II: The partial pressure o2026Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 2Consider the reaction performed in a 1 L container. The equilibrium constant is equal to 0.5 . If the reaction begins with 1 mole of moles o2025Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 3Consider the reaction equilibrium at a constant temperature T and at different values of total pressure P . Let V denote the volume of the r2024 (Session 1)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 4Consider the reactions Reaction 1: Reaction 2: being performed in two different reaction vessels of identical fixed volume and at the same t2024 (Session 2)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 5Consider the following reversible exothermic reaction in an aqueous solution with the equilibrium constant defined in terms of molarity, at 2022 (Session 1)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 6A certain gaseous reaction, carried out in an insulated sealed container results in an increase in temperature from 200 K to 400 K , with th2020 (Session 1)Le chatelier's principle
- 7Consider a chemical reaction with the equilibrium constants and defined in terms of pressure and concentration respectively. Considering the2020 (Session 2)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 8Consider two vessels X and Y , each of volume V, and at temperature T , connected through a tube fitted with a stop cock. Vessel X initially2019 (Session 1)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 9Consider the chemical equilibrium inside a vessel fitted with a movable piston at temperature T . The correct plot corresponding to volume c2019 (Session 2)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 10Consider the equilibrium . An inert gas is added to the system at constant volume and temperature. The correct statement(s) is/are:2017Le chatelier's principle
- 11Consider the equilibrium , established from pure , at a suitable temperature . Keeping the temperature constant, the equilibrium is studied 2016Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
- 12Consider the following reversible reaction at a particular temperature and pressure, for which the equilibrium constants in terms of mole fr2015Le chatelier's principle
Frequently Asked Questions
1.How many questions are available for Chemical Equilibrium?
This chapter includes 12 questions compiled from NEST (NISER) papers spanning 2015 to 2026.
2.Are these questions only from NEST (NISER), or from other exams too?
These are NEST (NISER) 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 NEST (NISER) Chemistry?
Chemical Equilibrium has appeared in 9 of the 16 years of NEST (NISER) papers covered here, with 12 questions across 12 papers - about one per paper it appears in.
4.What is the difficulty level of Chemical Equilibrium questions in NEST (NISER)?
Of the 12 questions analysed for this chapter, 8% are easy, 83% moderate and 8% tough. 2024 had the most, with 2 questions.
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 - 9 questions (75%)
- Le chatelier's principle - 3 questions (25%)
- Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application has produced the most tough questions (1).
6.Is Chemical Equilibrium's weightage in NEST (NISER) going up or down?
Across all 12 papers analysed, Chemical Equilibrium has averaged about 1.0 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 1.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.