This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 7 Equilibrium – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 9 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The reaction @@ext\{2NO\} ..... 2(g) ightleftharpoons ext\{N\} ..... 2ext\{O\} ..... 4(g) $ has an equilibrium constant $ $ at a certain temperature. If the initial concentration of $ $ is 0.8 M and no $ $ is present initially, what is the concentration of $ A) 0.6 M. B) 0.2 M. C) 0.4 M. D) 0.8 M. Show Answer Correct Answer: C) 0.4 M. 2. The idea that when a system at equilibrium is stressed, it will react to relieve that stress and return to equilibrium is known as: A) Charles Law. B) Boyle's Law. C) Le Chatelier's Principle. D) Denninger's Law. Show Answer Correct Answer: C) Le Chatelier's Principle. 3. 2A + 3B <$\rightarrow$ 2ABThe forward reaction forms the substance ..... A) A. B) AB. C) A + B. D) B. Show Answer Correct Answer: B) AB. 4. Transfer of thermal energy, in a liquid or gas, in which the warmer substance risesand the cooler substance sinks; forms a current. A) Thermal Energy. B) Conduction. C) Convection. D) Radiation. Show Answer Correct Answer: C) Convection. 5. Calculate the solubility of Ca$_{3}$(PO$_{4}$)$_{2}$(s) (Ksp = 1.3 x 10$^{-32}$) in a 1.0 x 10$^{-2}$ M Ca(NO$_{3}$)$_{2}$ solution. A) 3.16 x 10$^{-12}$ mol/L. B) 6.2 x 10$^{-7}$ mol/L. C) 1.6 x 10$^{-14}$ mol/L. D) 5.7 x 10$^{-14}$ mol/L. Show Answer Correct Answer: D) 5.7 x 10$^{-14}$ mol/L. 6. Orang yang melakukan aktivitas wirausaha yang dicirikan dengan pandai atau berbakat mengenali produk baru, menentukan cara produksi baru, menyusun manajemen operasi untuk pengadaan produk baru, memasarkannya, serta mengatur permodalan operasinya disebut dengan Personal Branding A) Salah. B) Benar. C) All the above. D) None of the above. Show Answer Correct Answer: A) Salah. 7. Point at which supply and demand curve intersect each other A) Price ceiling. B) Excess demand. C) Equilibrium. D) Disequilibrium. Show Answer Correct Answer: C) Equilibrium. 8. Which of the following is the condition needed to establish the equilibrium? A) Constant Temperature. B) Products and reactants should be in constant dynamic motion. C) All reactants and products should be in closed system. D) All of the above. Show Answer Correct Answer: D) All of the above. 9. Define chemical equilibrium. A) A reaction is reversible. B) A state where the concentration of the reactants is equal to the concentration of the products. C) A state where the rate of a forward reaction is equal to the rate of the reverse reaction. D) A state where the reaction stops and no further change in concentration occurs. Show Answer Correct Answer: C) A state where the rate of a forward reaction is equal to the rate of the reverse reaction. 10. The concentration of hydronium ions equals A) 10$^{pH}$. B) -10$^{-pH}$. C) -10$_{}$$^{pH}$. D) 10$^{-pH}$. Show Answer Correct Answer: D) 10$^{-pH}$. 11. At equilibrium, the concentrations of the products and reactants are constant over time. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 12. What is the minimum and maximum value of the investment multiplier?(separate the two answers by a comma or a semicolon) A) -1, 1. B) 0, infinity. C) 1, infinity. D) 0, 1. Show Answer Correct Answer: C) 1, infinity. 13. Which of the following is NOT a condition for Hardy-Weinberg Equilibrium? A) No mutations. B) Random Mating. C) No natural selection. D) Gene flow. Show Answer Correct Answer: D) Gene flow. 14. A larger K means there are ..... products at equilibrium A) More. B) Less. C) All the above. D) None of the above. Show Answer Correct Answer: A) More. 15. Static equilibrium occurs when an object is A) Rotating. B) Translating. C) At rest. D) Rotating and translating. Show Answer Correct Answer: C) At rest. 16. Which of the following best describes Le Chatelier's principle? A) It describes the energy changes during a chemical reaction. B) It explains the rate of reaction at equilibrium. C) It predicts the direction of a shift in equilibrium when a system is disturbed. D) It states that equilibrium can only be achieved in closed systems. Show Answer Correct Answer: C) It predicts the direction of a shift in equilibrium when a system is disturbed. 17. Legal maximum that can be charged for a good. A) Price ceiling. B) Excess demand. C) Equilibrium. D) Disequilibrium. Show Answer Correct Answer: A) Price ceiling. 18. Which of the following statements is true about the equilibrium constant (K ..... eq) for a chemical reaction? A) K eq is always greater than 1 for all reactions. B) K eq is independent of temperature. C) K eq is a measure of the extent of a reaction at equilibrium. D) K eq changes with the concentration of reactants and products. Show Answer Correct Answer: C) K eq is a measure of the extent of a reaction at equilibrium. 19. For the reaction ..... SO$_{2}$ + O$_{2}$ <=> $_{}$SO$_{3}$If the concentration of SO$_{2 }$is increased, the equilibrium position of the reaction will shift ..... A) To the left. B) To the right. C) To the left and right. D) Neither left nor right. Show Answer Correct Answer: B) To the right. 20. Kp is can be found for equilibrium mixtures of: A) Gases. B) Liquids. C) Heterogenous systems. D) Solids. Show Answer Correct Answer: A) Gases. 21. What is the state in which market supply and demand balance each other, and as a result prices become stable? A) Market Price. B) Market Equilibrium. C) Market Disequilibrium. D) None of the above. Show Answer Correct Answer: B) Market Equilibrium. 22. Varignon's theorem is used to find A) Magnitude of Resultant. B) Direction of Resultant. C) Position of Resultant. D) None of the above. Show Answer Correct Answer: C) Position of Resultant. 23. Point at which supply and demand come together A) Price ceiling. B) Excess demand. C) Equilibrium. D) Disequilibrium. Show Answer Correct Answer: C) Equilibrium. 24. Kp is affected by: A) Concentration and pressure. B) Temperature only. C) The position of equilibrium. D) Adding a catalyst. Show Answer Correct Answer: B) Temperature only. 25. In a well-insulated house on a hot summer day, what happens to the thermal energy inside the house? A) It stays in the same place without moving. B) It moves from cooler rooms to warmer rooms. C) It moves from warmer rooms to cooler rooms until equilibrium is reached. D) It escapes to the outside. Show Answer Correct Answer: C) It moves from warmer rooms to cooler rooms until equilibrium is reached. 26. A substance that increases the rate of a reaction without being used up during the reaction is called a A) Catalyst. B) Solute. C) Product. D) Reactant. Show Answer Correct Answer: A) Catalyst. 27. A substance which speeds up the rate of a chemical reaction but which is not consumed in the reaction is known as what type of material? A) A catalyst. B) An equilibrium constant. C) A reactant. D) An activated complex. Show Answer Correct Answer: A) A catalyst. 28. During equilibrium, the amount of the products and the amount of the reactants are ..... A) Constantly decreasing. B) Constantly increasing. C) Constant (unchanging). D) Equal. Show Answer Correct Answer: C) Constant (unchanging). 29. Second law of Gossen A) The second law of Gossen is related to supply and demand. B) The second law of Gossen is the law of diminishing marginal utility. C) The second law of Gossen defines the concept of total utility. D) The second law of Gossen states that utility increases with consumption. Show Answer Correct Answer: B) The second law of Gossen is the law of diminishing marginal utility. 30. What is the formula for calculating marginal utility? A) Marginal Utility = $\Delta$Q / $\Delta$TU. B) Marginal Utility = $\Delta$TU / $\Delta$Q. C) Marginal Utility = TU / Q. D) Marginal Utility = Total Utility-Average Utility. Show Answer Correct Answer: B) Marginal Utility = $\Delta$TU / $\Delta$Q. 31. A large value for the specific rate constant (k) means the reaction is A) Incomplete. B) Relatively fast. C) Occurs over several steps. D) Relatively slow. Show Answer Correct Answer: B) Relatively fast. 32. The K$_{sp}$ value for aluminum hydroxide is very small at 3.0 x 10$^{-34 }$at 25 $^\circ$C. From this we can conclude which statement below is most likely to be true of aluminum hydroxide. A) Aluminum hydroxide will be only very slightly soluble in water. B) Aluminum hydroxide will easily decompose into aluminum, hydrogen and oxygen. C) Aluminum hydroxide will be a gas at room temperature. D) Aluminum hydroxide will be very chemically unstable. Show Answer Correct Answer: A) Aluminum hydroxide will be only very slightly soluble in water. 33. Which of the following statements is not correct regarding equilibrium? A) Equilibrium is achieved when the product and reactant concentrations are the same. B) Equilibrium is achieved when the concentrations of all reactants is constant. C) Equilibrium is achieved when the forward and reverse reactions are equal. D) Equilibrium is achieved when the ratio of products to reactants is constant. Show Answer Correct Answer: A) Equilibrium is achieved when the product and reactant concentrations are the same. 34. The rate at which TU change in indicated by A) MU. B) TU. C) Both option 1&2. D) None of the above. Show Answer Correct Answer: A) MU. 35. In the reaction @@CO(g) + 2H ..... 2(g) ightleftharpoons CH ..... 3OH(g) $, the equilibrium constant $ $ is 14.5 at 500 K. If the initial concentrations are $ $, $ $, and $ $, what is the equilibrium concentration of $ A) 0.20 M. B) 0.15 M. C) 0.10 M. D) 0.05 M. Show Answer Correct Answer: C) 0.10 M. 36. Cardinal approach is A) Utility approach. B) IC approach. C) All the above. D) None of the above. Show Answer Correct Answer: A) Utility approach. 37. A person mixes 100.0 mL of 0.0015M CaCl$_{2}$ and 50.0 mL of 0.0081M K$_{2}$SO$_{4}$. If the K$_{sp}$ for CaSO$_{4}$ is 2.4 x 10$^{-5 }$, will a CaSO$_{4 }$precipitate be observed? A) No precipitate occur. B) Precipitate occur. C) All the above. D) None of the above. Show Answer Correct Answer: A) No precipitate occur. 38. If in the chemical change:A(aq) + B(aq) $\rightarrow$ C (aq), and more A is added, then what happens? A) The Kc or Keq for this aqueous reaction stays the same. B) This aqueous reaction shifts "to the left" toward reactants. C) This aqueous reaction shifts "to the right" toward products. D) The Kc or Keq for this aqueous reaction changes. Show Answer Correct Answer: C) This aqueous reaction shifts "to the right" toward products. 39. Which of the following have no impact on output in the short run A) Capital Employed. B) Price of Raw Materials. C) Employment. D) Technology. Show Answer Correct Answer: D) Technology. 40. If you heat one end of a metal rod, how does the thermal energy move through the rod to reach thermal equilibrium? A) Through radiation only. B) Through convection only. C) Through conduction only. D) Through a combination of conduction and convection. Show Answer Correct Answer: D) Through a combination of conduction and convection. 41. Forward reaction is A) Always reversible. B) Reactants to products (left to right). C) Products to reactants (right to left). D) Always endothermic. Show Answer Correct Answer: B) Reactants to products (left to right). 42. Gradualism occurs when geologic and climatic conditions are ..... A) Short. B) Stable. C) Long. D) Unstable. Show Answer Correct Answer: B) Stable. 43. What is the conjugate base of HCO$_{3}$$^{-}$? A) CO$_{3}$$^{2-}$. B) H$_{2}$CO$_{3}$$^{-}$. C) H$_{2}$CO$_{3}$. D) HCO$_{3}$$^{-}$. Show Answer Correct Answer: A) CO$_{3}$$^{2-}$. 44. Which of the following is not an assumption required for Hardy-Weinberg equilibrium? A) Random mating. B) No mutations. C) Population size must fluctate. D) No selection is occuring. Show Answer Correct Answer: C) Population size must fluctate. 45. Why is equilibrium called a dynamic state? A) Chemists try to convert as much reactants as possible into products. B) The reactions at equilibrium continue to take place once equilibrium is established. C) The products of a forward reaction are favored, so equilibrium lies to the right. D) All chemical reactions are considered to be reversible under suitable conditions. Show Answer Correct Answer: B) The reactions at equilibrium continue to take place once equilibrium is established. 46. P$^{H }$of 10$^{-8}$M NaOH solution is A) 8. B) 6.8. C) 7. D) 4. Show Answer Correct Answer: B) 6.8. 47. The angle of rotation is A) Ratio of the radius to arc length. B) Product of arc length, pi, and radius. C) Ratio of the arc length to radius. D) Product of diameter and arc length. Show Answer Correct Answer: C) Ratio of the arc length to radius. 48. Marginal Utility A) Can be positive or negative but not zero. B) Is always negative. C) Is always positive. D) Can be positive or negative or zero. Show Answer Correct Answer: D) Can be positive or negative or zero. 49. When the following conditions are met, total utility is at its peak: A) Marginal utility is at its maximum. B) Total utility is decreasing. C) Marginal utility is negative. D) Marginal utility is zero. Show Answer Correct Answer: D) Marginal utility is zero. 50. A car weighing 15 000 N rests on a 15$^{o}$ hill. If the car's brakes were released, which of these components would move the car downhill? A) Parallel. B) Perpendicular. C) Downward. D) Clockwise. E) Counter Clockwise. Show Answer Correct Answer: A) Parallel. 51. Marginal utility refers to: A) The additional product produced as the firm adds one additional unit of an input. B) The additional utility that a consumer derives from consuming one additional unit of a good. C) The amount of utility divided by the number of units produced. D) All of the above. Show Answer Correct Answer: B) The additional utility that a consumer derives from consuming one additional unit of a good. 52. What do you call the difference between the maximum price a consumer is willing to pay and the actual price they do pay? A) Consumer Surplus. B) Shortage. C) Surplus. D) Producer Surplus. Show Answer Correct Answer: A) Consumer Surplus. 53. If producers of lemonade expect a heatwave next week, today their supply of lemonade will A) Increase. B) Decrease. C) Stay the same. D) None of the above. Show Answer Correct Answer: B) Decrease. 54. When the rate of the forward reaction is equal to the rate of backward reaction, the system is said to be in A) Stoichiometry. B) Chemical Balance. C) Chemical Reaction. D) Chemical Equilibrium. Show Answer Correct Answer: D) Chemical Equilibrium. 55. The concentration of OH-in a saturated solution of Mg(OH)$_{2}$ is 3.6 x 10$^{-4 }$M. The Ksp of Mg(OH)$_{2}$ is A) 1.3 x 10$^{-7}$. B) 3.6 x 10$^{-4}$. C) 4.7 x 10$^{-11}$. D) 2.3 x 10$^{-11}$. Show Answer Correct Answer: D) 2.3 x 10$^{-11}$. 56. A very high value for K indicates that A) Reactants are favored. B) Equilibrium is reached slowly. C) Products are favored. D) Equilibrium has been reached. Show Answer Correct Answer: C) Products are favored. 57. What are spillover costs? A) Regular rises in price absorbed by the market. B) Production costs paid by the general public. C) Distribution costs paid by the middle person. D) Extra distribution costs paid by the manufacturer. Show Answer Correct Answer: B) Production costs paid by the general public. 58. How is the equilibrium constant defined? A) It is defined as the sum of the concentrations of reactants and products at equilibrium. B) It is defined as the ratio of the initial concentrations of reactants and products. C) It is defined as the ratio of the equilibrium concentrations of products to reactants. D) It is defined as the difference between the initial and equilibrium concentrations of reactants and products. Show Answer Correct Answer: C) It is defined as the ratio of the equilibrium concentrations of products to reactants. 59. What are some examples of heat transfer? A) Conduction. B) Convection. C) Radiation. D) All of the above. Show Answer Correct Answer: D) All of the above. 60. Which of the following statements is CORRECT for a reaction at an equilibrium? A) The rate of forward and reverse reactions are equal. B) The final concentrations of product and reactant are equal. C) The initial concentrations of product and reactant are equal. D) The rate constant of the forward and reverse reactions are equal. Show Answer Correct Answer: A) The rate of forward and reverse reactions are equal. ← PreviousNext →Related QuizzesScience QuizzesClass 11 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books