For NEET UG 2025, Chemical Equilibrium is an important chapter, having 2 to 3 questions with a 6-8% weightage. Important NEET 2025 topics that have been frequently repeated in previous NEET exams are the relation between Kc and Kp, equilibrium affecting factors, and Le Chatelier's Principle applications, so it is a must-revise topic for the NEET exam.

Practice with Chemical Equilibrium NEET previous year questions and Equilibrium NEET study material regularly can help you in obtaining good marks in the NEET UG 2025 exam.

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Listed below is the list of Chemical Equilibrium questions with detailed solutions asked in NEET exam.
 


 

1. Amongst the given options which of the following molecules/ion acts as a Lewis acid?
NEET (UG) - 2023 NEET (UG)
A) H₂O
B) BF₃
C) OH⁻
D) NH₃
View Solution

2. 3O₂(g) ⇌ 2O₃(g) for the above reaction at 298 K, Kc is found to be 3.0 x 10⁻⁵⁹. If the conc. of O₂ at equilibrium is 0.040 M then concentration of O₃ in M is
NEET (UG) - 2022 NEET (UG)
A) 4.38 x 10⁻³²
B) 1.9 x 10⁻⁶³
C) 2.4 x 10³¹
D) 1.2 x 10²¹
View Solution
3. What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed?
NEET (UG) - 2015 NEET (UG)
A) 7
B) 1.04
C) 12.65
D) 2
View Solution
4. The values of Ksp of CaCO₃ and CaC₂O₄ are 4.7 x 10⁻⁹ and 1.3 x 10⁻⁹ respectively at 25°C. If the mixture of these two is washed with water, what is the concentration of Ca²⁺ ions in water?
NEET (UG) - 2013 NEET (UG)
A) 5.831 x 10⁻⁵ M
B) 6.856 x 10⁻⁵ M
C) 3.606 x 10⁻⁵ M
D) 7.746 x 10⁻⁵ M
View Solution
5. Which will make basic buffer?
NEET (UG) - 2010 NEET (UG)
A) 100 mL of 0.1 M HCl + 100 mL of 0.1 M NaOH
B) 100 mL of 0.1 M HCl + 100 mL of 0.1 M NaOH
C) 50 mL of 0.1 M NaOH + 25 mL of 0.1 M CH₃COOH
D) 100 mL of 0.1 M CH₃COOH + 100 mL of 0.1 M NaOH
View Solution
6. The solubility of BaSO₄ in water is 2.42 x 10⁻³ gL⁻¹ at 298 K. The value of its solubility product (Ksp) will be (Given molar mass of BaSO₄ = 233 g mol⁻¹)
NEET (UG) - 2018 NEET (UG)
A) 1.08 x 10⁻⁸ mol² L⁻²
B) 1.08 x 10⁻¹⁰ mol² L⁻²
C) 1.08 x 10⁻¹⁴ mol² L⁻²
D) 1.08 x 10⁻¹² mol² L⁻²
View Solution
7. Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the H⁺ ion concentration in the mixture?
NEET (UG) - 2008 NEET (UG)
A) 1.11 x 10⁻⁴ M
B) 3.7 x 10⁻⁴ M
C) 3.7 x 10⁻³ M
D) 1.11 x 10⁻³ M
View Solution
8. Which has highest pH:-
NEET (UG) - 2002 NEET (UG)
A) CH₃COOK
B) Na₂CO₃
C) NH₄Cl
D) NaNO₃
View Solution
9. Equilibrium constant Kp for following reaction: MgCO₃ ⇌ MgO(s) + CO₂(g)
NEET (UG) - 2000 NEET (UG)
A) Kp = PCO₂
B) Kp = PCO₂ x PMgO x PMgO/PMgCO₃
C) Kp = PCO₂ + PMgO/PMgCO₃
D) Kp = PMgCO₃/PCO₂ x PMgO
View Solution
10. The pH of the solution containing 50 mL each of 0.10 M sodium acetate and 0.01 M acetic acid is [Given pKa of CH₃COOH = 4.57]
NEET (UG) - 2022 NEET (UG)
A) 5.57
B) 3.57
C) 4.57
D) 2.57
View Solution

NEET UG 2025 Chemistry Paper Exam Pattern

The NEET 2025 Chemistry section consists of 45 questions, which is 25% of the total paper. NEET Chemistry section is of total 180 marks.

Section Weightage (%) Key Topics
Physical Chemistry 30–35% Thermodynamics, Electrochemistry, Chemical Kinetics, Equilibrium, and Solutions.
Inorganic Chemistry 30–35% Periodic Table, p-block, d-block, f-block elements, Coordination Compounds, and Chemical Bonding.
Organic Chemistry 35–40% Reaction mechanisms, Hydrocarbons, Alcohols, Phenols, Aldehydes, Ketones, Biomolecules, and Polymers.

NEET 2025 Chemistry Chapter-Wise Weightage

Unit Weightage (%) Class
Some Basic Concepts of Chemistry 2–3% Class 11
Structure of Atom 2–3% Class 11
Chemical Bonding and Molecular Structure 5% Class 11
Thermodynamics 5% Class 11
Equilibrium 6% Class 11
Redox Reactions 3% Class 11
The States of Matter 3% Class 11
Solutions 4% Class 12
Electrochemistry 4–5% Class 12
Chemical Kinetics 3% Class 12
Surface Chemistry 2% Class 12
Classification of Elements and Periodicity 2% Class 11
The p-Block Elements 5% Class 12
The d- and f-Block Elements 4% Class 12
Coordination Compounds 5% Class 12
Haloalkanes and Haloarenes 3% Class 12
Alcohols, Phenols, and Ethers 4% Class 12
Aldehydes, Ketones, and Carboxylic Acids 4–5% Class 12
Amines 2–3% Class 12
Biomolecules 3% Class 12
Polymers 2% Class 12
Chemistry in Everyday Life 2% Class 12

NEET Last 10 Year Question Papers Pdf For NEET 2025 Preparation (2024 - 2017)

You can download the NEET previous year question paper pdfs with solutions from the table given below:

NEET Previous Question Papers By NTA Download PDF
NEET Exam 2024 Check Here
NEET Exam 2023 Check Here
NEET Exam 2022 Check Here
NEET Exam 2021 Check Here
NEET Exam 2020 Check Here
NEET Exam 2019 Check Here
NEET Exam 2018 Check Here
NEET Exam 2017 Check Here

Difficulty Analysis Of NEET UG Chemistry:

Section Difficulty Level Key Topics
Physical Chemistry Moderate to Difficult Chemical Kinetics, Thermodynamics, Electrochemistry, States of Matter, Surface Chemistry, Solutions
Organic Chemistry Moderate Hydrocarbons, Alcohols, Phenols and Ethers, Organic Chemistry based on Functional Groups, Biomolecules, Polymers, Chemistry in Everyday Life

Frequently Asked Questions:

1. Is NEET important for equilibrium?

Yes, equilibrium is an essential subject for NEET, which usually holds substantial weightage in the Chemistry portion. It consists of topics such as Chemical Equilibrium and Ionic Equilibrium, which are tested regularly. For effective preparation, go through Equilibrium NEET notes and solve Equilibrium NEET questions. You may even download Equilibrium NEET notes PDF or Equilibrium NEET PDF for in-depth study material. Also go through chemical equilibrium class 11 notes for better NEET 2025 prep.

2. What is the weightage of equilibrium in NEET?

The weightage of equilibrium in NEET is generally 6-8% in the Chemistry part, which means 2-3 questions. Chemical Equilibrium and Ionic Equilibrium are very important topics. To prepare specifically, apply Chemical Equilibrium previous year questions NEET PDF and Ionic Equilibrium NEET PYQ to know the pattern and level of questions.

3. Which chemistry is hard for NEET?

Physical Chemistry, such as Chemical Equilibrium, is difficult for many students because it is conceptual and numerical. Ionic Equilibrium, is also considered difficult because it is complex. Practice with Equilibrium NEET Questions with Solutions and learn from Chemical Equilibrium NEET PYQ self study materials and equilibrium class 11 ncert solutions to gain confidence.

4. Is ionic equilibrium tough for NEET?

Ionic Equilibrium may be challenging for NEET candidates as it entails grasping concepts such as pH, buffers, and solubility products, which entail theory and application both. But through regular practice with Ionic Equilibrium NEET PYQ and Equilibrium NEET questions, coupled with Equilibrium NEET notes, you can excel in this topic as well.

5. What is Le Chatelier's principle Class 11 NCERT?

Le Chatelier's principle, according to Class 11 NCERT, is that when a system in equilibrium is disturbed by altering concentration, temperature, or pressure, the system will adjust in such a manner as to resist the change. Le Chatelier's principle plays a central role in Chemical Equilibrium. To understand it further, see Le Chatelier's principle Class 11 Notes and State Le Chatelier's principle Class 11 in Equilibrium Class 11 NCERT PDF Notes.

6. What is Le Chatelier's principle for a chemical reaction at equilibrium?

Le Chatelier's principle for an equilibrium chemical reaction foretells how the system will react to outside changes. For instance, a rise in the concentration of the reactants moves the equilibrium towards products. It is an important concept for NEET and Class 11 students. Learn it with Equilibrium Class 11 Notes and solve with Equilibrium Class 11 questions and answers to become a master of its applications.

7. What is equilibrium Class 11 NCERT?

Equilibrium in Class 11 NCERT is a condition in which the rate of forward reaction is equal to the reverse reaction in an equilibrium chemical reaction, leading to the concentrations of products and reactants remaining constant. It encompasses Chemical and Ionic Equilibrium. Learn about this subject with Equilibrium Class 11 NCERT Solutions PDF and Equilibrium Class 11 NCERT PDF for thorough insights.

8. What is the solution equilibrium in chemistry?

Solution equilibrium in chemistry is the equilibrium in a solution due to processes such as dissolution and precipitation, usually associated with Ionic Equilibrium. For example, it is used in sparingly soluble salts and their solubility products. To learn more about this, refer to Equilibrium Class 11 NCERT PDF Notes and see related topics such as Class 11 Chemistry CH 7 redox reaction NCERT Solutions for a complete understanding of Class 11 Chemistry.