This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > 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 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If an object in mechanical equilibrium is stable, then it is without ..... A) The force being used by Darth Vadar. B) Changes in motion. C) Inconsistency. D) Rest or relaxation. Show Answer Correct Answer: B) Changes in motion. 2. 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. 3. 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. 4. Define equilibrium constant. A) The temperature at which a reaction takes place. B) Numerical value representing the ratio of product to reactant concentrations at equilibrium. C) The total amount of reactants in a system. D) The rate at which a reaction occurs. Show Answer Correct Answer: B) Numerical value representing the ratio of product to reactant concentrations at equilibrium. 5. 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. 6. Which of the following is an example of dynamic equilibrium in a real-world scenario? A) A plant growing in a garden. B) A car accelerating on a highway. C) A sealed bottle of carbonated drink where the fizz remains constant. D) A river flowing into the ocean. Show Answer Correct Answer: C) A sealed bottle of carbonated drink where the fizz remains constant. 7. 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. 8. 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. 9. 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. 10. 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 left (towards reactants). B) If K is less than 1, the reaction will proceed to the right (towards products). C) If K is greater 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: C) If K is greater than 1, the reaction will proceed to the right (towards products). 11. In the Hardy-Weinberg Equation, q$^{2}$ is the frequency of what? A) The recessive allele. B) The dominant allele. C) The recessive genotype. D) The dominant genotype. Show Answer Correct Answer: C) The recessive genotype. 12. If a K value is greater than 1, A) More products are present at equilibrium. B) More reactants are present at equilibrium. C) All the above. D) None of the above. Show Answer Correct Answer: A) More products are present at equilibrium. 13. In an equilibrium graph, what does a shift to the left indicate? A) The reaction is at equilibrium. B) More reactants are formed. C) The reaction has stopped. D) More products are formed. Show Answer Correct Answer: B) More reactants are formed. 14. What states or phases are not included in the calculation of the equilbrium constant Keq? A) Pure liquids. B) Gases. C) Pure solids & liquids. D) Aqueous ions. E) Pure solids. Show Answer Correct Answer: C) Pure solids & liquids. 15. Lami's theorem can not be applied in case of concurrent forces (three concurrent forces) A) Agree. B) Disagree. C) Can't be said. D) None of these. Show Answer Correct Answer: B) Disagree. 16. When the government sets a price floor on earned income, it is called which of the following? A) Employment guarantee. B) Minimum wage. C) Base-level wage. D) Market equilibrium rate. Show Answer Correct Answer: B) Minimum wage. 17. A hinged support has how many reactions A) One. B) Four. C) Three. D) Two. Show Answer Correct Answer: D) Two. 18. If the pressure of a system is increased, which direction will equilibrium shift? A) Toward the side with less moles of gas. B) Toward the side with more moles of gas. C) It will not shift. D) None of the above. Show Answer Correct Answer: A) Toward the side with less moles of gas. 19. For the formation of NO$_{2}$, Kc = [NO$_{2}$]/[NO][O$_{2}$]$^{1/2}$. At equilibrium in a 2.50 L container, there are 3.00 mol NO, 4.00 mol O$_{2}$ and 22.0 mol NO$_{2}$. The value of Kc is: A) 13.4. B) 5.80. C) 33.6. D) 0.0116. Show Answer Correct Answer: B) 5.80. 20. Coefficient of friction is having unit A) Dyne. B) Kg/m2. C) Unit less. D) None of these. Show Answer Correct Answer: C) Unit less. 21. A single sided arrow ($\rightarrow$), indicates that a reaction is: A) Reversible. B) Irreversible. C) Not reactive. D) None of the above. Show Answer Correct Answer: B) Irreversible. 22. Which one of the following quantities is zero when a uniform rod is supported in the middle? A) Weight. B) Pressure. C) Moment. D) Mass. Show Answer Correct Answer: C) Moment. 23. When quantity supplied is smaller than quantity demanded, you have a ..... A) Shortage. B) Equilibrium. C) Deficit. D) Surplus. Show Answer Correct Answer: A) Shortage. 24. How does punctuated equilibrium differ from gradualism? A) Punctuated equilibrium involves slow, steady change; gradualism involves rapid bursts. B) Punctuated equilibrium involves rapid bursts of change; gradualism involves slow, steady change. C) Both involve rapid bursts of change. D) Both involve slow, steady change. Show Answer Correct Answer: B) Punctuated equilibrium involves rapid bursts of change; gradualism involves slow, steady change. 25. Investment multiplier = A) $\frac{\Delta Y}{\Delta I}$. B) $\frac{Y}{I}$. C) $\frac{\Delta C}{\Delta I}$. D) $\frac{\Delta I}{\Delta Y}$. Show Answer Correct Answer: A) $\frac{\Delta Y}{\Delta I}$. 26. For fixed support number of unknown are A) 2. B) 1. C) 3. D) 4. Show Answer Correct Answer: C) 3. 27. Indifference mean:- A) X is preferred to y. B) Y is preferred to x. C) X & y are equally preferred. D) None of the above. Show Answer Correct Answer: C) X & y are equally preferred. 28. How does a catalyst affect the position of the equilibrium? A) The reaction would be slower. B) Position of equilibrium will shift to the right. C) It does not. It only increases the rate of reaction. D) Position of equilibrium will shift to the left. Show Answer Correct Answer: C) It does not. It only increases the rate of reaction. 29. A traffic light is supported by two cables that are 140$^{o }$ apart. Each cable exerts a force of 150. N on the light. How much does the light weigh? A) 141 N. B) 51.3 N. C) 102 N. D) 282 N. Show Answer Correct Answer: C) 102 N. 30. A reaction at dynamic equilibrium is subjected to an increase in pressure. Which of the following statements is true? A) The equilibrium will shift towards the side with fewer moles of gas. B) The equilibrium will not be affected by pressure changes. C) The reaction will stop until the pressure is reduced. D) The equilibrium will shift towards the side with more moles of gas. Show Answer Correct Answer: A) The equilibrium will shift towards the side with fewer moles of gas. 31. The table summarizing quantity supplied at several prices is known as the A) Demand schedule. B) Supply schedule. C) Supply curve. D) Equilibrium point. Show Answer Correct Answer: B) Supply schedule. 32. When quantity supplied and quantity demanded is equal A) Surplus. B) Shortage. C) Equilibrium. D) Law of demand. Show Answer Correct Answer: C) Equilibrium. 33. A population's recessive allele frequency 25%. What is the percentage of the Homozygous Dominant genotype? A) .5625. B) .5. C) .0625. D) .3750. E) .25. Show Answer Correct Answer: A) .5625. 34. A car weighing 15 000 N rests on a 15$^{o}$ hill. Find the components of the force exerted by the car's weight parallel to the hill A) 3900N. B) 15000N. C) 3880N. D) 3800N. Show Answer Correct Answer: A) 3900N. 35. When K$_{eq}$ < 1, 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: B) There are more reactant than products when the reaction reached equilibrium. 36. Two equal and oppositely directed forces acting on an object will be in equilibrium A) Only if they act on the same point on the object. B) When they are balanced by a third force. C) When their moments about the same point are equal. D) If they are separated by a distance. Show Answer Correct Answer: C) When their moments about the same point are equal. 37. The factors that effect a system at equilibrium except: A) Caltalyst. B) Temperature. C) Pressure and volume. D) Concentration. Show Answer Correct Answer: A) Caltalyst. 38. Gradualism and punctuated equilibrium A) Never exist together. B) Can exist together. C) Must happen after each other. D) Must exist together. Show Answer Correct Answer: B) Can exist together. 39. Which of these could NOT be a unit for partial pressure? A) Mol dm$^{-3}$. B) KPa. C) Pa. D) Atm. Show Answer Correct Answer: A) Mol dm$^{-3}$. 40. In a qualitative analysis for the presence of Pb$^{2+}$, Fe$^{2+}$, and Cu$^{2+}$ ions in an aqueous solution, which of the following will allow the separation of Pb2+ from the other ions at room temperature? A) Adding dilute HNO$_{3}$(aq) solution. B) Adding dilute Na$_{2}$S (aq) solution. C) Adding dilute NaOH(aq) solution. D) Adding dilute NH$_{3}$(aq) solution. E) Adding dilute HCl(aq) solution. Show Answer Correct Answer: E) Adding dilute HCl(aq) solution. 41. What is the law of mass action? A) The law stating that the volume of a gas is inversely proportional to its pressure. B) The law stating that equilibrium constants remain constant with changing concentrations. C) The law stating that the rate of a chemical reaction is directly proportional to the concentration of reactants. D) The law stating that energy is conserved in a chemical reaction. Show Answer Correct Answer: B) The law stating that equilibrium constants remain constant with changing concentrations. 42. If you burn your hand on the handle of a hot pot, heat was transferred to your skin by A) Radiation. B) Convection. C) Conduction. D) Equilibrium. Show Answer Correct Answer: C) Conduction. 43. A population of frogs has 37 individuals who are brown in color and 194 individuals who express the dominant green color. What is the dominant allele frequency for this population? A) 0.6. B) 0.8. C) 0.4. D) 0.2. Show Answer Correct Answer: A) 0.6. 44. Calculate the approximate boiling point (in $^{o}$C) of a solution of 285 g of magnesium chloride in 2.0 kg of water. (K$_{b}$=0.51 $^{o}$C/m) A) 103.1 $^{o}$C. B) 102.3 $^{o}$C. C) 104.8 $^{o}$C. D) 101.6 $^{o}$C. Show Answer Correct Answer: B) 102.3 $^{o}$C. 45. The financial and opportunity costs consumers pay in looking for a good or service. A) Surplus. B) Search costs. C) Fad. D) Shortage. Show Answer Correct Answer: B) Search costs. 46. Which of the following changes will shift the position of the equilibrium to the left? A) Increasing the temperature of an exothermic reaction. B) Increasing the pressure of a reaction that has the same number of moles of gas on both sides. C) Adding a catalyst to a reaction. D) Adding more concentrations to the reactants. Show Answer Correct Answer: A) Increasing the temperature of an exothermic reaction. 47. A 300.0-mL saturated solution of copper(II) periodate, Cu(IO$_{4}$)$_{2}$, contains 0.44 grams of dissolved salt. Determine the Ksp. A) 9.2 x 10$^{-6}$. B) 6.1 x 10$^{-5}$. C) 1.4 x 10$^{-7}$. D) 6.72 x 10$^{-7}$. Show Answer Correct Answer: C) 1.4 x 10$^{-7}$. 48. Why is a consumer's spending restricted? A) Due to the utility maximisation. B) Due to the budget constraint. C) Due to the demand curve. D) Due to the marginal utility. Show Answer Correct Answer: B) Due to the budget constraint. 49. The lever arm is the ..... distance from the axis of rotation to the point where the force is exerted. A) Angular. B) Displaced. C) Perpendicular. D) None of these. Show Answer Correct Answer: C) Perpendicular. 50. If 30 mL of 5.0 x 10$^{-4}$ M Ca(NO$_{3}$)$_{2}$ are added to 70 mL of 2.0 x 10$^{-4}$ M NaF, will a precipitate occur? (Ksp of CaF$_{2}$ = 4.0 x 10$^{-11}$) A) Yes, because the ion product (Qsp) is less than Ksp. B) Yes, because the ion product is (Qsp) greater than Ksp. C) No, because the ion product (Qsp) is less than Ksp. D) No, because the ion product (Qsp) is greater than Ksp. Show Answer Correct Answer: C) No, because the ion product (Qsp) is less than Ksp. 51. If MPC = MPS, what is the value of the investment multiplier? A) 0. B) 1. C) 3. D) 2. Show Answer Correct Answer: D) 2. 52. Which of the following slows down the rate of a chemical reaction? A) Place the reactants in hot water. B) Place the products in ice bath. C) Keep stirring the reactants with a stirring rod. D) Place the reactants in a ice bath. Show Answer Correct Answer: D) Place the reactants in a ice bath. 53. Market forces are best described as A) Supply and demand determining prices. B) The government set a minimum price for corn so farmers can make more money. C) The government setting a maximum price on gas so people can save money. D) A group of buyers and sellers for a particular good or service. Show Answer Correct Answer: A) Supply and demand determining prices. 54. When all reactants and products have the same physical state, then the reaction is called A) Heterogeneous equilibrium. B) Homogeneous equilibrium. C) All the above. D) None of the above. Show Answer Correct Answer: B) Homogeneous equilibrium. 55. If a reversible reaction has reached equilibrium, which of the following is true about the concentration of the reactants vs the products? A) Some reactants are present, as are some prooducts. B) Only reactant is present, there are no products. C) Only product is present, there are no reactants. D) None of the above. Show Answer Correct Answer: A) Some reactants are present, as are some prooducts. 56. Solution A contains 0.1 mol of sucrose, dissolved in 500. g of water. Solution B contains 0.1 mol of sodium chloride, dissolved in 500. g of water. Which of the following statements about theses solutions is true? A) Both solutions have the same vapor pressure. B) Solution A would boil at a higher temperature than solution B would. C) Both solutions would boil at the same temperature. D) Solution A would freeze at a higher temperature than solution B would. Show Answer Correct Answer: D) Solution A would freeze at a higher temperature than solution B would. 57. Who gave the cardinal concept of utility? A) Marshall. B) Hicks. C) Pigou. D) Robinson. Show Answer Correct Answer: A) Marshall. 58. What is the purpose of a catalyst on an equilibrium reaction? A) To increase the rate of forward reaction. B) To increase rate of backward reaction. C) In increase both forward and backward reaction rates. D) No effect. Show Answer Correct Answer: C) In increase both forward and backward reaction rates. 59. For the reaction ..... SO$_{2}$ + O$_{2}$ <$\rightarrow$ $_{}$SO$_{3}$If the concentration of O$_{2 }$is decreased, the equilibrium of the reaction will shift ..... A) Left. B) Right. C) Left and right. D) Neither left nor right. Show Answer Correct Answer: A) Left. 60. Which of the following best describes dynamic equilibrium in a closed system? A) No reactions occur. B) Only forward reactions occur. C) Forward and reverse reactions occur at the same rate. D) Only reverse reactions occur. Show Answer Correct Answer: C) Forward and reverse reactions occur at the same rate. ← 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