This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 7 Equilibrium – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A nut can be loosen more easily with A) A heavy spanner because a larger force can be produced. B) Long spanner because a large turning effect can be produced. C) A short spanner because a larger force can be produced. D) A short spanner because a large turning effect can be produced. Show Answer Correct Answer: B) Long spanner because a large turning effect can be produced. 2. When K is large, A) There are more products than reactants when the reaction reached equilibrium. B) There are more reactant than products when the reaction reached equilibrium. C) The amount of reactants is equal to the amount of products. D) None of the above. Show Answer Correct Answer: A) There are more products than reactants when the reaction reached equilibrium. 3. Which of the following usually makes a substance dissolve faster in a solvent? A) Increasing the particle size of the solute. B) Lowering the temperature. C) Adding more solvent to the solution. D) Decreasing the number of particles. Show Answer Correct Answer: C) Adding more solvent to the solution. 4. According to Bronsted law, water is a/an A) Acid and base both. B) Acid. C) Base. D) Salt. Show Answer Correct Answer: A) Acid and base both. 5. If the net force is 0 the object is ..... A) In motion. B) In the same place. C) All the above. D) None of the above. Show Answer Correct Answer: B) In the same place. 6. Which of the following salts shows the lowest solubility in water? (K$_{sp }$values:Ag$_{2}$S = 1.6 x 10$^{-49}$; Bi$_{2}$S$_{3}$ = 1.0 x 10$^{-72}$; HgS = 1.6 x 10$^{-54}$; and Mg(OH)$_{2}$ = 8.9 x 10$^{-12}$ A) Ag$_{2}$S. B) HgS. C) Bi$_{2}$S$_{3}$. D) Mg(OH)$_{2}$. Show Answer Correct Answer: B) HgS. 7. In a chemical equilibrium involving gases, what effect does increasing the pressure have on the equilibrium position? A) Increases the rate of the forward reaction only. B) Shifts towards the side with fewer moles of gas. C) Shifts towards the side with more moles of gas. D) No effect on the equilibrium position. Show Answer Correct Answer: B) Shifts towards the side with fewer moles of gas. 8. Increasing the concentration increases the speed of reaction by A) Exposing more reactant. B) Speeding up the reactants. C) Lowering activation energy. D) Increasing collisions. Show Answer Correct Answer: D) Increasing collisions. 9. Consider the following reaction:4NH$_{3}$(g) + 5O$_{2}$(g) $\Longleftrightarrow$ A) Mol$^{-2}$ dm$^{6}$. B) Mol dm$^{-3}$. C) No unit. D) Mol$^{-1}$ dm$^{3}$. Show Answer Correct Answer: B) Mol dm$^{-3}$. 10. When an object is experiencing a net torque A) It is translating. B) It is rotating. C) It is in dynamic equilibrium. D) It is in static equilibrium. Show Answer Correct Answer: B) It is rotating. 11. Chemical equilibrium can be compared to the movement of skiers at a busy ski resort because: A) The number of skiers carried up the mountain is equal to the number coming down the slopes. B) The number of people at the top and the number at the bottom of the slope do not change. C) Skiers undergo physical processes similar to the changes in chemical equilibrium. D) The concentration of skiers at the top and the bottom of the slope remains constant. Show Answer Correct Answer: B) The number of people at the top and the number at the bottom of the slope do not change. 12. What would be the effect of decreasing the concentration of the reactant on the position of the equilibrium? A) Equilibrium shifts to the left. B) Equilibrium shifts to the right. C) No change in position of equilibrium. D) None of the above. Show Answer Correct Answer: A) Equilibrium shifts to the left. 13. A 6.0 kg box sledge is travelling across the ice at a speed of 9.0 m/s when a 12 kg package is dropped into it vertically. As a result it A) Stops moving. B) Continues to move at half the initial speed. C) Continues to move at the same speed. D) Continues to move at one-third the initial speed. Show Answer Correct Answer: D) Continues to move at one-third the initial speed. 14. For the reaction @@ext\{N\} ..... 2(g) + 3ext\{H\} ..... 2(g) ightleftharpoons 2ext\{NH\} ..... 3(g) $, the equilibrium constant $ $ is 0.5 at a certain temperature. If the initial concentrations are $ $ and $ $, what will be the concentration of $ A) 1.5 M. B) 2.0 M. C) 0.5 M. D) 1.0 M. Show Answer Correct Answer: D) 1.0 M. 15. If the reaction quotient Q has a value larger than the related equilibrium constant, K ..... A) The reaction is at equilibrium. B) The reaction is not at equilibrium, and will make more products at the expense of reactants. C) The reaction is not at equilibrium, and will make more reactants at the expense of products. D) The value of K will increase until it is equal to Q. Show Answer Correct Answer: C) The reaction is not at equilibrium, and will make more reactants at the expense of products. 16. Reverse reaction A) A substance that forms in a chemical reaction. B) Factors found in the built, natural, and social environments such as noise, temperature, humidity, and pressure. C) A substance that takes part in and undergoes change in a chemical reaction. D) The reaction that forms reactants from products. Show Answer Correct Answer: D) The reaction that forms reactants from products. 17. Equilibrium in a market means which of the following? A) The point at which quantity supplied and quantity demanded are the same. B) The point at which unsold goods begin to pile up. C) The point at which suppliers begin to reduce prices. D) None of the above. Show Answer Correct Answer: A) The point at which quantity supplied and quantity demanded are the same. 18. How does a catalyst change during a reaction? A) It combines with the reactants. B) It is part of the products. C) It precipitates. D) It remains unchanged. Show Answer Correct Answer: D) It remains unchanged. 19. Equal amounts of reactants are poured into a suitable container. Given sufficient time, the reactants may be converted almost entirely to products if: A) K is greater than 1. B) K is equal to 0. C) K is equal to 1. D) K is less than 1. Show Answer Correct Answer: A) K is greater than 1. 20. What is the relationship between the forward rate of reaction and the reverse rate of reaction in a reversible reaction at equilibrium? A) Forward is greater. B) Reverse is greater. C) The two are equal. D) Can not determine unless you know the rate law and k. Show Answer Correct Answer: C) The two are equal. 21. Why does a higher temperature increase the rate of a reaction? A) It increases both the frequency and energy of particle collisions. B) It only increases the frequency of particle collisions. C) It only increases the energy of particle collisions. D) It reduces the activation energy of the reaction. Show Answer Correct Answer: A) It increases both the frequency and energy of particle collisions. 22. Indifference curve slopes downward from A) Left to right. B) Right to left. C) Both of these. D) None of these. Show Answer Correct Answer: A) Left to right. 23. Given:2A(g) <=> 2B(g) + C(g). At a particular temperature, K$_{c}$ = 16000.Raising the pressure, by decreasing the volume of the container, will ..... A) Have no effect on the value of K$_{c}$ as temperature does not change$_{}$. B) Cause the value of K$_{c}$ to decrease$_{}$. C) Cause the value of K$_{}$$_{c}$ to increase. D) Favour the forward reaction. Show Answer Correct Answer: A) Have no effect on the value of K$_{c}$ as temperature does not change$_{}$. 24. When the quantity demanded is greater than the quantity supplied it is known as A) An opportunity cost. B) A surplus. C) A shortage. D) Equilibrium. Show Answer Correct Answer: C) A shortage. 25. If the forces acting on an object have a net force of zero then the object must be at rest. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 26. Number of atoms having energy more than H in an ensemble of total N atoms (at temperature T ) is, K is Boltzmann constant. A) Exp(H/KT). B) Exp(-H/KT). C) -exp(H/KT). D) N*exp(-H/KT). E) None of these are correct. Show Answer Correct Answer: D) N*exp(-H/KT). 27. If K A) Left. B) Right. C) All the above. D) None of the above. Show Answer Correct Answer: A) Left. 28. Energy will always be transferred from the ..... A) Hotter sample to the colder sample. B) Colder sample to the hotter sample. C) All the above. D) None of the above. Show Answer Correct Answer: A) Hotter sample to the colder sample. 29. According to Le Chatelier's Principle, what happens to the equilibrium position when the temperature of an exothermic reaction is increased? A) Shifts to the right, favoring products. B) Shifts to the right, favoring reactants. C) Shifts to the left, favoring reactants. D) Remains unchanged. Show Answer Correct Answer: C) Shifts to the left, favoring reactants. 30. What type of evolution where there is a sudden, rapid change then no change for a long time? A) Punctuated Equilibrium. B) Convergent Evolution. C) Co-Evolution. D) Divergent Evolution. Show Answer Correct Answer: A) Punctuated Equilibrium. 31. The value of K$_{sp}$ of AgCl is 1.8 x 10$^{-10}$. What would be the molar concentration of Ag$^{+}$ and Cl$^{-}$ in AgCl in pure water placed in contact with solid AgCl$_{(s)}$? A) 1.8 x 10 $^{-10}$ M. B) 3.2 x 10$^{-20}$ M. C) 1.3 x 10 $^{-5}$ M. D) 1.7 x 10$^{-7}$M. Show Answer Correct Answer: D) 1.7 x 10$^{-7}$M. 32. Which of the following are not in a state of equilibrium? A) An object at rest. B) An object moving in a straight line at a constant speed. C) An object that is speeding up. D) None of the above. Show Answer Correct Answer: C) An object that is speeding up. 33. Sodium chloride is added slowly to a solution that is 0.010 M in Cu+, Ag+, and Au+. The Ksp values for the chloride salts are 1.9 x 10$^{-7}$, 1, 6 x 10$^{-10}$, and 2.0 x 10$^{-13}$, respectively. Which compound will precipitate first? A) CuCl(s). B) AgCl(s). C) AuCl(s). D) All will precipitate at the same time. Show Answer Correct Answer: C) AuCl(s). 34. Which of the following will precipitate when combined with the sulfide ion? A) Ba$^{+2}$. B) Ca$^{+2}$. C) NH$_{4}$$^{+1}$. D) Rb$^{+1}$. Show Answer Correct Answer: B) Ca$^{+2}$. 35. A reaction is in a state of dynamic equilibrium when A) It is in an open system. B) There is the same amount of product and reactant. C) The forward and reverse rates are equal. D) You change the temperature. Show Answer Correct Answer: C) The forward and reverse rates are equal. 36. A decrease in supply causes the supply curve to shift to the right. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 37. Want satisfying power of a commodity is called A) Utility. B) Demand. C) Consumers equilibrium. D) None of these. Show Answer Correct Answer: A) Utility. 38. A consumer reaches equilibrium when:- A) Marginal utility less than price. B) Marginal utility greater than price. C) Total utility is equal. D) Marginal utility is equal to price. Show Answer Correct Answer: D) Marginal utility is equal to price. 39. As more of a good is consumed, total utility A) Increases. B) Decreases. C) Remains the same. D) Becomes negative and then turns positive. Show Answer Correct Answer: A) Increases. 40. Chemical equilibrium refers to the state of a system in which the concentration of the reactant and the concentration of the products do not change with time, and the system does not display any further change in properties. What is the principle related to chemical equilibrium? A) Mandeleev principle. B) Arrhenius theory. C) Le Chatelier. D) Dalton principle. Show Answer Correct Answer: C) Le Chatelier. 41. If the concentration of a reactant is increased then equilibrium shifts in A) Forward direction for endothermic reaction. B) Forward direction. C) Backward direction for endothermic reaction. D) Backward direction. Show Answer Correct Answer: B) Forward direction. 42. What effect does adding heat to a reversible reaction have on the position of equilibrium? A) It shifts to the left. B) It shifts to the right. C) It stops the reaction. D) It has no effect. Show Answer Correct Answer: B) It shifts to the right. 43. In punctuated equilibrium, what typically follows a period of rapid evolutionary change? A) A long period of stasis. B) Reversal to previous traits. C) Immediate extinction. D) Continuous rapid change. Show Answer Correct Answer: A) A long period of stasis. 44. For the reaction ..... heat + N$_{2}$ + O$_{2}$ <$\rightarrow$ 2NOIf O$_{2}$ is removed, the concentration of N$_{2}$ will ..... A) Increase. B) Double. C) Remain the same. D) Decrease. Show Answer Correct Answer: A) Increase. 45. Which of the following best describes the concept of punctuated equilibrium in evolutionary biology? A) A theory that evolution occurs in small, gradual steps over time. B) A theory that species remain stable for long periods and undergo rapid changes in short bursts. C) A theory that all species evolve at a constant rate. D) A theory that evolution is driven solely by environmental changes. Show Answer Correct Answer: B) A theory that species remain stable for long periods and undergo rapid changes in short bursts. 46. Ionic product of water increases if A) OH-is added. B) Pressure is reduced. C) Temperature is increased. D) H + is added. Show Answer Correct Answer: C) Temperature is increased. 47. Which of the following is true if the value of the equilibrium constant, K, is greater than 1 A) Products are favored over reactants. B) Reactants are favored over products. C) Reactants and products are equally favored. D) None of the above. Show Answer Correct Answer: A) Products are favored over reactants. 48. In a saturated solution of calcium sulfate, what happens if more calcium ions are added? A) The solution remains unchanged. B) The solution becomes unsaturated. C) Calcium sulfate precipitates out of the solution. D) The solubility of calcium sulfate increases. Show Answer Correct Answer: C) Calcium sulfate precipitates out of the solution. 49. What is the way heat moves through liquids and gases called? A) Convection. B) Radiation. C) Conduction. D) None of the above. Show Answer Correct Answer: A) Convection. 50. What does the variable q represent? A) Frequency of the heterozygote genotype. B) Frequency of the homozygous recessive genotype. C) The frequency of the recessive allele. D) The frequency of the dominant allele. Show Answer Correct Answer: C) The frequency of the recessive allele. 51. If I make a solution by adding water to 27.72 g of methanol (CH$_{3}$OH) until the final volume of the solution is 275 mL, what is the molarity of methanol in this solution? A) 3.13 M CH$_{3}$OH. B) 5.66 M CH$_{3}$OH. C) 0.77 M CH$_{3}$OH. D) 2.19 M CH$_{3}$OH. Show Answer Correct Answer: A) 3.13 M CH$_{3}$OH. 52. Which of the following is characteristics of utility A) Utility is a psychological concept. B) Utility is subjective. C) Utility is a relative concept. D) All of these. Show Answer Correct Answer: D) All of these. 53. The following reaction:SO$_{2 (g)}$ + NO$_{2 (g)}$ <=> SO$_{3 (g)}$ + NO (g) had reached a state of equilibrium, was found to contain 0.40 mol L$^{-1}$ SO$_{3}$, and 0.30 mol L$^{-1}$ NO, 0.15 mol L$^{-1}$NO$_{2}$, and 0.20 mol L$^{-1}$ SO$_{2}$. Calculate the equilibrium constant for this reaction. A) 4. B) .25. C) .42. D) 1. Show Answer Correct Answer: A) 4. 54. What is the unit for the rate constant (k) for 2$^{nd }$order reactions? A) S$^{-1}$. B) M/s. C) M$^{-1}$s$^{-1}$. D) None of the above. Show Answer Correct Answer: C) M$^{-1}$s$^{-1}$. 55. Located on the left side of the reaction A) Reactants. B) Products. C) All the above. D) None of the above. Show Answer Correct Answer: A) Reactants. 56. Which of the following is true if consuming one unit of good yields 100 utils and consuming the second unit of the good increases satisfaction by 20 utils? A) The marginal utility of the second unit is 80. B) The total utility of consuming two units is 120. C) The marginal utility of the second unit is 120. D) The marginal utility of the first unit is 20. Show Answer Correct Answer: B) The total utility of consuming two units is 120. 57. Which of these best defines equilibrium in a market? A) A situation in which quantity supplied is greater than quantity demanded. B) A situation in which quantity demanded is greater than quantity supplied. C) A situation in which quantity supplied and quantity demanded are equal. D) A situation where a minimum price is set. Show Answer Correct Answer: C) A situation in which quantity supplied and quantity demanded are equal. 58. The demand function and supply function for a good in the market are as follows:Qd = 140-10pQs = 20 + 10pWhat is the Pe? A) Rm60. B) Rm6. C) Rm8. D) Rm80. Show Answer Correct Answer: B) Rm6. 59. The force from a cable or string is A) Scale. B) Tension. C) Normal force. D) Weight. Show Answer Correct Answer: B) Tension. 60. What happens if there is surplus? A) Sellers stick to the price they are offering. B) Buyers are easy to find. C) Sellers offer their products by lowering the price. D) Sellers offer their products by raising the price. Show Answer Correct Answer: C) Sellers offer their products by lowering the price. ← 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 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books