This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 7 Equilibrium – Quiz 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 11 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. TRUE or FALSE: "At equilibrium, the CONCENTRATIONS of products STAY the SAME" A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 2. What is the effect of increasing the concentration of a reactant on the equilibrium position? A) No effect on the equilibrium position. B) Causes the reaction to stop. C) Shift to the right. D) Shift to the left. Show Answer Correct Answer: C) Shift to the right. 3. Forward reaction A) The substance that does the dissolving. B) The reaction that forms products from reactants. C) To produce. D) The reaction that forms reactants from products. Show Answer Correct Answer: B) The reaction that forms products from reactants. 4. In a given time period, a person consumes more and more of a good and enjoys each additional unit less and is willing to pay less for it, because of: A) Diminishing returns. B) Diminishing marginal product. C) Diminishing marginal utility. D) Increasing costs. Show Answer Correct Answer: C) Diminishing marginal utility. 5. What factor would prevent equilibrium from being reached A) Constant temperature. B) Closed system. C) Presence of both reactants and products. D) Irreversible reaction. Show Answer Correct Answer: D) Irreversible reaction. 6. TRUE or FALSE: "At equilibrium, the CONCENTRATIONS of reactants and products are EQUAL" A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. If the equilibrium constant is much greater than one (K >> 1) then A) Equilibrium is not established. B) Equilibrium lies to the right (products are favored). C) Equilibrium lies to the left (reactants are favored). D) Neither products or reactants are favored. Show Answer Correct Answer: B) Equilibrium lies to the right (products are favored). 8. What do you call the amount where consumers get what they want and suppliers could sell what they're offering? A) Quantity Demanded. B) Quantity Supplied. C) Equilibrium price. D) Equilibrium quantity. Show Answer Correct Answer: D) Equilibrium quantity. 9. A complete reaction is in which: A) All the reactants convert into products. B) All the reactants do not convert into products. C) Half reactants convert into products. D) Only 10% reactants convert into products. Show Answer Correct Answer: A) All the reactants convert into products. 10. What happens to K is a reaction is doubled? A) K$^{2}$. B) 2K. C) 1/2K. D) -K. Show Answer Correct Answer: A) K$^{2}$. 11. Equilibrium price is the price at which the quantity of a product demanded by consumers and the quantity supplied by producers A) Are different. B) Are equal. C) Is higher for the product demanded. D) Is higher for the product supplied. Show Answer Correct Answer: B) Are equal. 12. Gibbs Free Energy is A) U+TS. B) H+TS. C) U-TS. D) H-TS. E) U+pV. Show Answer Correct Answer: D) H-TS. 13. What occurs when thermal equilibrium is reached within a system? A) The system cools down rapidly. B) Heat transfer stops completely. C) All substances within the system have the same temperature. D) Thermal energy flows in the opposite direction. Show Answer Correct Answer: C) All substances within the system have the same temperature. 14. Calculate the pH of water at 40$^\circ$ C, given thatK$_{w}$ = 3.8 x 10$^{-14}$ at this temperature. A) 0.58. B) 3.80. C) 7.00. D) 6.71. Show Answer Correct Answer: D) 6.71. 15. The square brackets in a K$_{c}$ expression represent? A) Concentration. B) Concentration in mol L$^{-1}$. C) Concentration in g L$^{-1}$. D) The same as round brackets. Show Answer Correct Answer: B) Concentration in mol L$^{-1}$. 16. The K$_{sp}$ expression for a saturated solution of Ca$_{3}$(PO$_{4}$)$_{2 }$is A) K$_{sp }$= [Ca$^{2+}$][PO$_{4}$$^{3-}$]. B) K$_{sp }$= [3Ca$^{2+}$][2PO$_{4}$$^{3-}$]. C) K$_{sp }$= [Ca$^{2+}$]$^{3}$[PO$_{4}$$^{3-}$]$^{2}$. D) K$_{sp }$= [3Ca$^{2+}$]$^{3}$[2PO$_{4}$$^{3-}$]$^{2}$. Show Answer Correct Answer: C) K$_{sp }$= [Ca$^{2+}$]$^{3}$[PO$_{4}$$^{3-}$]$^{2}$. 17. The net force on an object in equilibrium is: A) Greater than zero. B) Zero. C) Less than zero. D) Need more specific information to answer. Show Answer Correct Answer: B) Zero. 18. What is the activation energy? A) The quantity of heat absorbed in a reaction. B) The minimum energy needed to begin a reaction. C) The energy given off after reactants collide. D) Both the energy and frequeny of collisions in increasedthe energy difference between reactants and products. Show Answer Correct Answer: B) The minimum energy needed to begin a reaction. 19. Which of the following happens when the Qs is greater than the Qd? A) Equilibrium. B) Surplus. C) Shortage. D) Consumer surplus. Show Answer Correct Answer: B) Surplus. 20. Which of the following is true about chemical reaction at equilibrium A) Only the forward reaction stops. B) Only the reverse reaction stops. C) Both forward and reverse reactions stop. D) The rate constants for the forward and reverse reactions are equal. E) The rates of the forward and reverse reactions are equal. Show Answer Correct Answer: E) The rates of the forward and reverse reactions are equal. 21. Which is a factor that would not affect the rate of a reaction? A) Temperature. B) Adding a catalyst. C) Concentration. D) The weather. Show Answer Correct Answer: D) The weather. 22. What makes an effective collision? A) When molecules collide. B) When molecules collide with the proper orientation. C) When molecules collide with proper orientation and enough kinetic energy. D) High Temperature. Show Answer Correct Answer: C) When molecules collide with proper orientation and enough kinetic energy. 23. What is the amount that producers benefit by selling at a market price that is higher than the least that they would be willing to sell for? A) Shortage. B) Surplus. C) Consumer Surplus. D) Producer Surplus. Show Answer Correct Answer: D) Producer Surplus. 24. Explain the effect on the position of equilibrium of increasing temperature A) Equilibrium position shifts in the exothermic reaction so temperature goes up. B) Equilibrium position shifts in the endothermic reaction so temperature goes down. C) All the above. D) None of the above. Show Answer Correct Answer: B) Equilibrium position shifts in the endothermic reaction so temperature goes down. 25. In a market equilibrium graph, what happens if the demand curve shifts left? A) Price increases. B) Price decreases. C) Quantity increases. D) Quantity remains constant. Show Answer Correct Answer: B) Price decreases. ← 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