This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 7 Equilibrium – Quiz 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 12 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In a chemical reaction at equilibrium, what happens to the concentrations of reactants and products? A) They continue to change over time. B) They remain constant over time. C) They increase over time. D) They decrease over time. Show Answer Correct Answer: B) They remain constant over time. 2. For K$_{p }$= K$_{c}$: A) $\Delta$n=1. B) $\Delta$n>1. C) $\Delta$n=0. D) $\Delta$n<1. Show Answer Correct Answer: C) $\Delta$n=0. 3. A person sits on a freely spinning lab stool that has no friction in its axle. When this person extends her arms, A) Her moment of inertia increases and her angular speed decreases. B) Her moment of inertia decreases and her angular speed increases. C) Her moment of inertia increases and her angular speed increases. D) Her moment of inertia increases and her angular speed remains the same. Show Answer Correct Answer: A) Her moment of inertia increases and her angular speed decreases. 4. In the context of Le Chatelier's Principle, what is the effect of increasing pressure on the equilibrium position of the reaction @@ext\{N\} ..... 2(g) + 3ext\{H\} ..... 2(g) ightleftharpoons 2ext\{NH\} ..... 3(g)@@? A) Shifts to the right. B) Shifts to the left. C) No change. D) Equilibrium is destroyed. Show Answer Correct Answer: A) Shifts to the right. 5. To protect high-cost domestic producers, a country imposes a tariff on an imported commodity, Y. Which of the following is most likely to occur in the short run?I. A decrease in domestic production of Y II. An increase in domestic production of Y III. An increase in foreign output of Y A) I only. B) II only. C) III only. D) I and III only. E) II and III only. Show Answer Correct Answer: B) II only. 6. Which of the following changes the equilibrium constant? A) Pressure. B) Temperature. C) Concentration. D) Catalyst. Show Answer Correct Answer: B) Temperature. 7. In a chemical equilibrium graph, what does the plateau represent? A) The reaction has stopped. B) The reaction is at equilibrium. C) The reaction is accelerating. D) The reaction is reversing. Show Answer Correct Answer: B) The reaction is at equilibrium. 8. In a reaction at equilibrium involving only gases, a change in pressure of the reaction mixture shifts the position of equilibrium only when: A) The reaction is exothermic as written. B) The gases are impure. C) The collision rate increases. D) Heat is absorbed by the reaction proceeding to the right. E) The moles of gas are not equal on the two sides of the equation. Show Answer Correct Answer: E) The moles of gas are not equal on the two sides of the equation. 9. What type of system is required for a reversible reaction to reach equilibrium? A) Open system. B) Closed system. C) Isolated system. D) Dynamic system. Show Answer Correct Answer: B) Closed system. 10. Identify the incorrect statement about achieving equilibrium. A) Achieved when product and reactant concentrations are equal. B) Achieved when forward and reverse reaction rates are same. C) Achieved when concentration of reactants is stable/constant. D) Achieved when concentration ratio of reactants to products becomes stable, thus fixing the equilibrium constant (equilibrium position). Show Answer Correct Answer: A) Achieved when product and reactant concentrations are equal. 11. Heat always travels from ..... to ..... objects A) Hot to cold. B) Cold to hot. C) Cold to cold. D) Hot to hot. Show Answer Correct Answer: A) Hot to cold. 12. The amount of a substance in a given volume. A) Concentration. B) Temperature. C) Surface area. D) Catalyst. Show Answer Correct Answer: A) Concentration. 13. A situation in which the quantity supplied is greater than the quantity demanded is A) A shortage. B) A surplus. C) A price floor. D) A price ceiling. Show Answer Correct Answer: B) A surplus. 14. A circular roller of weight W hangs by a tie rod and rests against a smooth vertical wall. The tension in the rod AB will be A) Less than weight W. B) Greater then W. C) Equal to W. D) None of these. Show Answer Correct Answer: C) Equal to W. 15. Exposing more particles for collisions is an increase in A) Concentration. B) Surface area. C) Temperature. D) Catalyst. Show Answer Correct Answer: B) Surface area. 16. An equilibrium constant with a large value, e.g. K$_{c}$ = 1000, indicates ..... A) A very fast reaction. B) Mostly products at equilibrium. C) Mostly reactants at equilibrium. D) Nothing useful at all. Show Answer Correct Answer: B) Mostly products at equilibrium. 17. In an experiment, the equilibrium constant $K_p$ $ is found to be 2.0 at 1000 K. If the partial pressures at equilibrium are $ $ and $ $, what is the partial pressure of $ A) 0.1 atm. B) 0.2 atm. C) 0.3 atm. D) 0.4 atm. Show Answer Correct Answer: D) 0.4 atm. 18. Stephen Jay Gould helped develop the ..... model of evolution. A) Gradualism. B) Punctuated equilibrium. C) Microevolution. D) Macroevolution. Show Answer Correct Answer: B) Punctuated equilibrium. 19. Which of the following are Lewis acids? A) PH$_{3}$ and BCl$_{3}$. B) AlCl$_{3 }$and SiCl$_{4}$. C) PH$_{3}$ and SiCl$_{4}$. D) BCl$_{3}$ and AlCl$_{3}$. Show Answer Correct Answer: D) BCl$_{3}$ and AlCl$_{3}$. 20. What is the Ksp for silver phosphate (Ag$_{3}$PO$_{4}$) at 25$^\circ$C? The solubility of silver phosphate at 25$^\circ$C is 1.6 x 10$^{-5}$ mol/L. A) 7.7 x 10$^{-10}$. B) 1.8 x 10$^{-18}$. C) 8.6 x 10$^{-13}$. D) 3.3 x 10$^{-13}$. Show Answer Correct Answer: B) 1.8 x 10$^{-18}$. 21. For the reaction ..... SO$_{2}$ + O$_{2}$ <=> $_{}$SO$_{3}$If the equilibrium position shifts to the right, the concentration of O$^{}$$^{}$$_{2}$ will ..... A) Increase. B) Decrease. C) Remain the same. D) Double. Show Answer Correct Answer: B) Decrease. 22. What is a Couple? A) A pair of concurrent force. B) A pair of Coplanar force. C) A pair of unlike parallel force. D) A pair of Non coplanar concurrent force. Show Answer Correct Answer: C) A pair of unlike parallel force. 23. A situation in which a maximum price is set is referred to as A) A shortage. B) A surplus. C) A price ceiling. D) A price floor. Show Answer Correct Answer: C) A price ceiling. 24. Which of the following is true for a chemical reaction at equilibrium? A) Only the forward reaction stops. B) Both the forward and reverse reactions stop. C) The reaction quotient value is equal to equilibrium constant. D) The rate constants for the forward and reverse reactions are equal. Show Answer Correct Answer: C) The reaction quotient value is equal to equilibrium constant. 25. Macro economics deals with A) Individual units. B) Individual Demand. C) Aggregative units. D) All of these. Show Answer Correct Answer: C) Aggregative units. ← 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