This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 7 Equilibrium – Quiz 28 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 28 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A substance that increases speed of chemical reaction without being being changed is called: A) Catalyst. B) Acid. C) Base. D) Pressure. Show Answer Correct Answer: A) Catalyst. 2. Why is medium temperature used in the Haber process? A) Low temperature will form more ammonia. B) High temperature will form more hydrogen and nitrogen. C) The rate slows down. D) To increase the rate but not negatively affecting the yield. Show Answer Correct Answer: D) To increase the rate but not negatively affecting the yield. 3. A string 2 m long is tied to the ends of a uniform rod that weight 60 N and is 1.6 m long. The string passes over a nail so that the rod hangs vertically. The tension in the string will be. A) 24 N. B) 30 N. C) 42 N. D) 50 N. Show Answer Correct Answer: D) 50 N. 4. Which is incorrect for buffer solution? A) There is no change is pH value when acid and base is mixed. B) It contains strong acid and its conjugate base. C) It contains weak acid and its conjugate base. D) It contains weak base and its conjugate acid. Show Answer Correct Answer: B) It contains strong acid and its conjugate base. 5. A 15-kg child is sitting on a playground teeter-totter, 1.5 m from the pivot. What is the magnitude of the minimum force, applied 0.30 m on the other side of the pivot, that is needed to make the child lift off the ground? A) 66 N. B) 740 N. C) 23 N. D) 44 N. Show Answer Correct Answer: B) 740 N. 6. Explain the concept of dynamic equilibrium in chemical reactions. A) Equal rates of forward and reverse reactions. B) The reaction only proceeds in one direction. C) The reaction stops completely. D) The reaction rate increases over time. Show Answer Correct Answer: A) Equal rates of forward and reverse reactions. 7. Which form of evolution can occur quickly? A) Gradualism. B) Punctuated equilibrium. C) Allopatric speciation. D) Sympatric speciation. Show Answer Correct Answer: B) Punctuated equilibrium. 8. The minimum amount of energy needed for colliding particles to react is called A) Chemical Energy. B) Kinetic Energy. C) Activation Energy. D) Potential Energy. Show Answer Correct Answer: C) Activation Energy. 9. True or False:The value of K$_{eq}$ is constant AT a given temperature, but changes if the temperature is changed. A) True. B) False, the equilibrium constant is always the same regardless of the temperature. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 10. Business conducted without regard for government controls A) Rationing. B) Black market. C) Supply shock. D) Free market. Show Answer Correct Answer: B) Black market. 11. Indifference curve is a A) Tabular Presentation. B) Diagrammatic Presentation. C) Both A & B b. D) None of the above. Show Answer Correct Answer: B) Diagrammatic Presentation. 12. Will precipitation occur when 3.5 x 10$^{2}$ mL of 3.2 M Pb(NO$_{3}$)$^{2}$ and 2.0 x 10$^{2}$ mL of 0.020 M NaCl are added together. Ksp for the lead chloride is 1.6 x 10$^{-5}$. A) Yes, Q$_{sp}$ is greater than K$_{sp}$. B) No, Q$_{sp}$ is less than K$_{sp}$. C) Maybe, it depends on the temperature. D) Maybe, it depends on the limiting reagent. Show Answer Correct Answer: A) Yes, Q$_{sp}$ is greater than K$_{sp}$. 13. During equilibrium, the rates of the forward and the reverse reaction are ..... A) Equal. B) Unequal. C) Unequal for exothermic reactions. D) Unequal for endothermic reactions. Show Answer Correct Answer: A) Equal. 14. Consider this system:2CCl$_{4}$(g) + O$_{2}$(g)<$\rightarrow$2COCl$_{2}$(g) + 2Cl$_{2}$(g) $\Delta$H =-35 kJ/mol$_{rxn}$Predict the effect of increasing temperature. A) Speed up forward reaction. B) Speed up reverse reaction. C) No change. D) None of the above. Show Answer Correct Answer: B) Speed up reverse reaction. 15. What evidence supports the theory of punctuated equilibrium? A) Continuous fossil records showing gradual change. B) Fossil records showing sudden appearance of new species. C) Genetic mutations occurring at a constant rate. D) Observations of species adapting slowly over time. Show Answer Correct Answer: B) Fossil records showing sudden appearance of new species. 16. If an object in mechanical equilibrium is stable, then it is without ..... A) Changes in motion. B) Rest or relaxation. C) Inconsistency. D) The force being used by Darth Vadar. Show Answer Correct Answer: A) Changes in motion. 17. A hot object is at a ..... temperature than a cold object. A) Smaller. B) Higher. C) All the above. D) None of the above. Show Answer Correct Answer: B) Higher. 18. Which of the following best describes a reversible chemical reaction? A) A reaction that proceeds in only one direction. B) A reaction where the concentrations of reactants and products remain constant. C) A reaction that involves different substances as reactants and products. D) A reaction that occurs at a constant temperature. Show Answer Correct Answer: B) A reaction where the concentrations of reactants and products remain constant. 19. Define equilibrium constant. A) Numerical value representing the ratio of product to reactant concentrations at equilibrium. B) The temperature at which a reaction takes place. C) The total amount of reactants in a system. D) The rate at which a reaction occurs. Show Answer Correct Answer: A) Numerical value representing the ratio of product to reactant concentrations at equilibrium. 20. Conditions for equilibrium are:1st condition:net force = 02nd condition:net torque = 0Moving with constant velocity or Stationary/ rest A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 21. Which of the following is an example of dynamic equilibrium in a real-world scenario? A) A sealed bottle of carbonated drink where the fizz remains constant. B) A car accelerating on a highway. C) A plant growing in a garden. D) A river flowing into the ocean. Show Answer Correct Answer: A) A sealed bottle of carbonated drink where the fizz remains constant. 22. In a reversible reaction, what does the term 'equilibrium position' refer to? A) The concentration of reactants only. B) The concentration of products only. C) The relative concentrations of reactants and products at equilibrium. D) The rate of the forward reaction only. Show Answer Correct Answer: C) The relative concentrations of reactants and products at equilibrium. 23. Price is currently above equilibrium. This will create excess ..... We would expect price to ..... A) Demand; increase. B) Demand; decrease. C) Supply; increase. D) Supply; decrease. Show Answer Correct Answer: D) Supply; decrease. 24. Which of the following are equal for a chemical system at equilibrium? A) The concentrations of reactant and products are equal. B) The rate constants for the forward and reverse reactions are equal. C) The time that a particular atom or molecule spends as a reactant and product are equal. D) The rate of the forward and reverse reaction as the equilibrium has achieved. Show Answer Correct Answer: D) The rate of the forward and reverse reaction as the equilibrium has achieved. 25. How can the equilibrium constant (K) be used to predict the direction of a reaction? A) If K is greater than 1, the reaction will proceed to the right (towards products). B) If K is greater than 1, the reaction will proceed to the left (towards reactants). C) If K is less than 1, the reaction will proceed to the right (towards products). D) If K is less than 1, the reaction will proceed to the left (towards reactants). Show Answer Correct Answer: A) If K is greater than 1, the reaction will proceed to the right (towards products). ← PreviousNext →Related QuizzesClass 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 1Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 2Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 3Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 4Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 5Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 6Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 7Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 8Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 9Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books