Relevant Titles
-
CBSE Class 11 Chemistry MCQs: Chemical Equilibrium – Practice Test with Answers
-
NCERT Class 11 Chemistry Chapter 7 Equilibrium Important MCQs with Solutions
-
CBSE Class 11 Physical Chemistry Quiz – Chemical Equilibrium Concepts
-
Free Online CBSE Class 11 Chemistry MCQ Test: Chapter 7 Equilibrium
-
CBSE Board Class 11 Chemistry MCQs on Chemical Equilibrium for Exam Practice
Introduction Paragraph
Understanding Chemical Equilibrium is essential for mastering Chapter 7 – Equilibrium in CBSE Class 11 Chemistry. This topic forms the foundation for several advanced concepts in Physical Chemistry, including reaction dynamics, equilibrium constants (Kc and Kp), and the Le Chatelier’s Principle.
This online MCQ practice test is designed strictly as per the latest NCERT syllabus and CBSE Board exam standards, helping students strengthen their conceptual clarity and problem-solving skills. The questions cover the Law of Mass Action, types of equilibria, effect of temperature and pressure, and relation between Kp and Kc — all crucial for scoring well in school and competitive exams like JEE and NEET.
Each question includes instant feedback and detailed explanations for better understanding. Attempt this 30-question interactive quiz to test your knowledge, analyze your preparation level, and gain confidence in solving Chemical Equilibrium problems effectively.
Sample MCQs (with Answers and Explanations)
Q1. For the equilibrium reaction: N₂ + 3H₂ ⇌ 2NH₃, the equilibrium constant Kc is expressed as:
A) [N₂][H₂]³ / [NH₃]² B) [NH₃]² / [N₂][H₂]³ C) [NH₃] / [N₂][H₂] D) [H₂] / [NH₃]
Answer: B) [NH₃]² / [N₂][H₂]³
Explanation: The equilibrium constant expression includes the product concentrations raised to their stoichiometric powers divided by reactants raised to theirs.
Q2. The equilibrium constant K for a reaction depends on:
A) Catalyst B) Temperature C) Pressure D) Concentration
Answer: B) Temperature
Explanation: The value of K is influenced only by temperature; changes in catalyst or concentration do not alter it.
Q3. If Kp = Kc(RT)ⁿ, then for Δn = 0, the relationship between Kp and Kc is:
A) Kp > Kc B) Kp < Kc C) Kp = Kc D) Kp = 1/Kc
Answer: C) Kp = Kc
Explanation: When the number of moles of gaseous reactants equals the number of moles of products, Δn = 0 and Kp = Kc.
Q4. In an endothermic reaction, increasing temperature will:
A) Decrease equilibrium constant B) Increase equilibrium constant C) Not affect equilibrium D) Stop the reaction
Answer: B) Increase equilibrium constant
Explanation: For endothermic reactions, increasing temperature favors the forward reaction, thereby increasing K.
Q5. When Q < K for a reversible reaction, it means:
A) Reaction is at equilibrium B) Reaction will proceed forward C) Reaction will proceed backward D) Reaction will stop
Answer: B) Reaction will proceed forward
Explanation: If Q (reaction quotient) < K, the reaction moves forward to reach equilibrium by forming more products.