This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 7 Equilibrium – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 8 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The definition of a saturated solution. A) A saturated solution is one that contains the maximum concentration of solute that can be dissolved at a specific temperature and pressure. B) A saturated solution is one that has a lower concentration of solute than a supersaturated solution. C) A saturated solution is one that can dissolve any amount of solute regardless of temperature. D) A saturated solution is one that contains no solute at all. Show Answer Correct Answer: A) A saturated solution is one that contains the maximum concentration of solute that can be dissolved at a specific temperature and pressure. 2. If a population has the following genotype frequencies:AA = 0.42, Aa = 0.46, and aa = 0.12, what are the allele frequencies? A) A = 0.42, a = 0.12. B) A = 0.84, a = 0.24. C) A = 0.6, a = 0.4. D) A = 0.65, a = 0.35. Show Answer Correct Answer: D) A = 0.65, a = 0.35. 3. Define a shortage A) Where quantity demanded is less than quantity supplied. B) Where quantity demanded is greater than quantity supplied. C) Where quantity demanded is equal to quantity supplied. D) None of the above. Show Answer Correct Answer: B) Where quantity demanded is greater than quantity supplied. 4. Consider the equilibrium reaction:@@2NO ..... 2(g) ightleftharpoons N ..... 2O ..... 4(g) $. If the equilibrium constant $ A) $K_c = \frac{[NO_2]^2}{[N_2O_4]}$. B) $K_c = \frac{[NO_2]}{[N_2O_4]^2}$. C) $K_c = \frac{[N_2O_4]}{[NO_2]^2}$. D) $K_c = \frac{[N_2O_4]^2}{[NO_2]}$. Show Answer Correct Answer: C) $K_c = \frac{[N_2O_4]}{[NO_2]^2}$. 5. What type of reactions can able to change products back to the their original form? A) Reversible reactions. B) Combination reactions. C) Combustion reactions. D) Irreversible reactions. Show Answer Correct Answer: A) Reversible reactions. 6. A nut has been tightened by a force of 180 N using 8 cm long spanner. What length of a spanner is required to loosen the same nut with 150 N force A) 11 cm. B) 9.6 cm. C) 10.9 cm. D) 8.5 cm. Show Answer Correct Answer: B) 9.6 cm. 7. When pressure decreases, in which direction does the equilibrium shift? A) The equilibrium shifts in the direction that increases the number of moles of gas. B) The equilibrium shifts always shifts to the left. C) The equilibrium shifts in the direction that decreases the number of moles of gas. D) The equilibrium shifts always shifts to the right. E) The equilibrium does not shift. Show Answer Correct Answer: A) The equilibrium shifts in the direction that increases the number of moles of gas. 8. Heating will continue until what is reached? A) Energizers. B) Energy. C) Equilibrium. D) Equality. Show Answer Correct Answer: C) Equilibrium. 9. What is the factor affecting equilibrium? A) Concentration. B) Product. C) Catalyst. D) Reactant. Show Answer Correct Answer: A) Concentration. 10. If more reactants are used in a chemical reaction, more products will be produced. This is because A) More reactants cause the reaction to heat up. B) Too many products can slow down the reaction. C) More reactants have more atoms to react to form more products. D) More reactants take up the same volume. Show Answer Correct Answer: C) More reactants have more atoms to react to form more products. 11. What is the equilibrium? A) Change of velocity. B) When all the forces that act upon an object are balanced. C) When the net force is not zero. D) None. Show Answer Correct Answer: B) When all the forces that act upon an object are balanced. 12. When the marginal utility is equal to zero, what will the total utility be? A) Maximum. B) Laws of return. C) Minimum. D) None of the above. Show Answer Correct Answer: A) Maximum. 13. Select the equilibrium constant for the most reactant favored system. A) $3.0\times10^{-3}$. B) $2.0\times10^{-5}$. C) $7.0\times10^{-3}$. D) $8.0\times10^{-5}$. Show Answer Correct Answer: B) $2.0\times10^{-5}$. 14. What does the Hardy-Weinberg equilibrium measure? A) Changes in allele frequencies. B) Numbers of mutations. C) Fitness of organisms. D) Genetic diversity. Show Answer Correct Answer: A) Changes in allele frequencies. 15. This helps to speed up a reaction but does not take part in the chemical reaction. A) Combustion. B) Catalyst. C) Reactants. D) Coeffiecents. Show Answer Correct Answer: B) Catalyst. 16. The slope of budget line is measured by:- A) MRSxy. B) MRTSxy. C) Ratio of the prices of the 2 goods. D) All the above. Show Answer Correct Answer: C) Ratio of the prices of the 2 goods. 17. A presidential candidate promises that if elected, they will ensure that nobody will spend more than 20% of their monthly income on housing. What concept is this candidate promising? A) A housing price ceiling. B) A housing surplus. C) Housing equilibrium. D) A housing price floor. Show Answer Correct Answer: A) A housing price ceiling. 18. For simple support number of unknown reactions A) 3. B) 1. C) 2. D) 4. Show Answer Correct Answer: B) 1. 19. With the increase in consumption by one unit of the commodity, TU increases from 150 to 180, then MU is A) 50. B) 1.2. C) 0.833. D) 30. Show Answer Correct Answer: D) 30. 20. Define market equilibrium A) Where quantity demanded is less than quantity supplied. B) Where quantity demanded is greater than quantity supplied. C) Where quantity demanded is equal to quantity supplied. D) None of the above. Show Answer Correct Answer: C) Where quantity demanded is equal to quantity supplied. 21. What will be the solubility product of AX$_{3}$: A) 27S$^{4}$. B) 9S$^{3}$. C) 4S$^{3}$. D) 36S$^{4}$. Show Answer Correct Answer: A) 27S$^{4}$. 22. How might punctuated equilibrium be observed in a real-world scenario? A) A sudden appearance of a new species in the fossil record. B) A gradual increase in the size of a mammal species. C) A species of plant slowly changes its leaf shape over centuries. D) A consistent rate of genetic mutation in a population. Show Answer Correct Answer: A) A sudden appearance of a new species in the fossil record. 23. What is true about chemical equilibrium? A) It is dynamic in nature. B) Rate of forward reaction = Rate of backward reaction at equilibrium. C) Composition of reactants and products do not change on reaching equilibrium. D) All of above. Show Answer Correct Answer: D) All of above. 24. Ordinal utility analysis was developed by:- A) J.R.Hicks & R.J.D. Allen. B) Samualson. C) Marshall and Jevons. D) Slutsky. Show Answer Correct Answer: A) J.R.Hicks & R.J.D. Allen. 25. Which of the following is incorrect? A dynamic equilibrium can be achieved ..... A) In an open system. B) From 100% reactants. C) In a closed system. D) From 100% products. Show Answer Correct Answer: A) In an open system. 26. The collection of all the consumption bundles which costs the consumer exactly equal or strictly less than her money income is called A) Budget Set. B) Indifference Curve. C) Indifference Map. D) Budget Line. Show Answer Correct Answer: A) Budget Set. 27. Bursts of change followed by periods of stability. A) Extinction. B) Punctuated equilibrium. C) Gradualism. D) Speciation. Show Answer Correct Answer: B) Punctuated equilibrium. 28. What is Le Chatelier's principle and how does it relate to chemical equilibrium? A) Le Chatelier's principle only applies to solid-state reactions. B) Le Chatelier's principle is used to calculate the pH of a solution. C) Le Chatelier's principle has no relation to chemical equilibrium. D) Le Chatelier's principle explains how a system at equilibrium responds to changes in conditions such as temperature, pressure, or concentration. Show Answer Correct Answer: D) Le Chatelier's principle explains how a system at equilibrium responds to changes in conditions such as temperature, pressure, or concentration. 29. When rain is accompanied by a thunderstorm, the collected rainwater will have a pH value A) Slightly lower than that of rainwater without a thunderstorm. B) Slightly higher than that when the thunderstorm is not there. C) Which depends on the amount of dust in the air. D) Uninfluenced by the occurrence of a thunderstorm. Show Answer Correct Answer: A) Slightly lower than that of rainwater without a thunderstorm. 30. The allele frequency of p=.20 What is the percentage of recessive genotype? A) .64. B) .32. C) .04. D) .80. Show Answer Correct Answer: A) .64. 31. Activation energy is required to start a chemical reaction. What is activation energy? A) The energy needed for a reaction to occur. B) The minimum amount of energy needed for a reaction to potentially occur. C) The energy added by a catalyst. D) The energy possessed by the products. Show Answer Correct Answer: B) The minimum amount of energy needed for a reaction to potentially occur. 32. In a reversible reaction, what happens if the forward and backward rates are not the same? A) The reaction reaches equilibrium. B) The reaction becomes exothermic. C) The reaction stops. D) The reaction becomes irreversible. Show Answer Correct Answer: A) The reaction reaches equilibrium. 33. Dynamic equilibrium only occurs in closed systems. What does this mean? A) Where there is loss of products. B) Where there is no loss of reactants or products. C) Where there is loss of reactants. D) None of the above. Show Answer Correct Answer: B) Where there is no loss of reactants or products. 34. What is the K$_{sp}$ expression for an ionic compund of BaSO$_{4 }$ A) K$_{sp}$= [Ba$^{2+}$][4SO$_{4}$$^{2-}$]$^{4}$. B) K$_{sp}$= [2Ba$^{2+}$][4SO$_{4}$$^{2-}$]. C) K$_{sp}$= [Ba$^{2+}$][4SO$_{4}$$^{2-}$]. D) K$_{sp}$= [Ba$^{2+}$][SO$_{4}$$^{2-}$]. Show Answer Correct Answer: D) K$_{sp}$= [Ba$^{2+}$][SO$_{4}$$^{2-}$]. 35. Consumer equilibrium occurs when ..... A) They have spent all of their income. B) A person consumes quantities of three goods. C) A person consumes quantities of two goods. D) Satisfaction is maximised for a given level of income. Show Answer Correct Answer: D) Satisfaction is maximised for a given level of income. 36. A temperature increase causes the particles ..... A) In the right order. B) Move faster. C) Collide higher. D) To slow down. Show Answer Correct Answer: B) Move faster. 37. In a chemical reaction at equilibrium, what is the effect of decreasing the concentration of a product? A) The equilibrium shifts to favor the reactants. B) The equilibrium position does not change. C) The equilibrium constant decreases. D) The equilibrium shifts to favor more product formation. Show Answer Correct Answer: D) The equilibrium shifts to favor more product formation. 38. For any reaction at chemical equilibrium, the concentrations of products and reactants A) Remain unchanged. B) Decrease. C) Are equal. D) Change. Show Answer Correct Answer: A) Remain unchanged. 39. If body is in equilibrium under four forces then A) Resultant of any three forces equal to resultant of remaining. B) Resultant of any two forces equal to resultant of remaining. C) Resultant of any one forces equal to resultant of remaining. D) Can't say. Show Answer Correct Answer: B) Resultant of any two forces equal to resultant of remaining. 40. What is the pH of a solution that has an [H$_{3}$O$^{+}$] =1x10$^{-4}$? A) 2. B) 3. C) -4. D) 4. Show Answer Correct Answer: D) 4. 41. What does a large equilibrium constant (K much greater than 1) indicate? A) The reaction is at a high temperature. B) The equilibrium favors the products. C) The equilibrium favors the reactants. D) The reaction is irreversible. Show Answer Correct Answer: B) The equilibrium favors the products. 42. To slow down a chemical reaction you will do one of the following: A) Place the reactants in hot water. B) Keep stirring the reactants with a stirring rod. C) Place the reactants in a ice bath. D) Place the products in ice bath. Show Answer Correct Answer: C) Place the reactants in a ice bath. 43. What type of energy transfer occurs when hot water flows through cool water? A) Conduction. B) Radiation. C) Convection. D) Insulation. Show Answer Correct Answer: C) Convection. 44. The price where the quantity supplied equals the quantity demanded is known as A) Opportunity cost. B) Demand curve. C) Marginal analysis. D) Market equilibrium. Show Answer Correct Answer: D) Market equilibrium. 45. Indifference curve A) Concave to the origin. B) Both A & B. C) Convex to the origin. D) None of the above. Show Answer Correct Answer: C) Convex to the origin. 46. Changes in either demand or supply cause changes in market equilibrium A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 47. Which one of the following substances has the highest proton affinity? A) H$_{2}$S. B) NH$_{3}$. C) PH$_{3}$. D) H$_{2}$O. Show Answer Correct Answer: B) NH$_{3}$. 48. With unbalanced forces, the object will move in the direction of the ..... force. A) Larger. B) Smaller. C) Equal. D) None of the above. Show Answer Correct Answer: A) Larger. 49. A platform scale reads the A) Normal force. B) Mass. C) Density. D) Size. Show Answer Correct Answer: A) Normal force. 50. The moment of a force causes an object to A) Stop moving. B) Move forward. C) Move backward. D) Turn about a fixed point. Show Answer Correct Answer: D) Turn about a fixed point. 51. When quantity demanded is more than quantity supplied A) Price ceiling. B) Excess demand. C) Equilibrium. D) Disequilbrium. Show Answer Correct Answer: B) Excess demand. 52. A wrench is used to tighten a nut. A 25N perpendicular force is applied 50cm away from the axis of rotation, and moves a distance of 10 cm as it turns. What is the torque applied to the wrench? A) 750 Nm. B) 12.5 Nm. C) 10.0 Nm. D) 150 Nm. Show Answer Correct Answer: B) 12.5 Nm. 53. If no external torque acts on a body, its angular velocity remains conserved. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 54. In a chemical reaction, if the equilibrium constant (K ..... c) is very small, what does this indicate about the reaction? A) The reaction favors the formation of reactants. B) The reaction is at equilibrium. C) The reaction is very fast. D) The reaction favors the formation of products. Show Answer Correct Answer: A) The reaction favors the formation of reactants. 55. How does the equilibrium constant change with temperature for an exothermic reaction? A) It increases as temperature increases. B) It decreases as temperature increases. C) It remains constant regardless of temperature changes. D) It first increases and then decreases with temperature. Show Answer Correct Answer: B) It decreases as temperature increases. 56. In the equilibrium expression, K represents A) The rate constant. B) The products' concentration. C) The equilibrium constant. D) The reactants' concentration. Show Answer Correct Answer: C) The equilibrium constant. 57. Which statement is true for a saturated solution? A) It must be a concentrated solution. B) It must be a diluted solution. C) Neither dissolving nor crystallizing is occurring. D) The rate of dissolving equals the rate of crystallizing. Show Answer Correct Answer: D) The rate of dissolving equals the rate of crystallizing. 58. Which of the following substances present in the chemical reaction would NOT be included in the equilibrium constant expression? A) Solvents. B) NaCl(s). C) H$_{2}$O(l). D) NH$_{4}$Cl(s). E) All of these. Show Answer Correct Answer: E) All of these. 59. All of the following are conditions for a product to form except A) Sufficient kinetic energy. B) Energetic collisionTwo particles will react if they collide with energy kinetic energy in the correct orientation. C) Proper size of molecules. D) Collision at correct orientation. Show Answer Correct Answer: C) Proper size of molecules. 60. Which of the following is a way that a firm can eliminate a surplus? A) Raise prices. B) Create a new product. C) Offer a sale on the item. D) None of the above. Show Answer Correct Answer: C) Offer a sale on the item. ← 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books