This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 7 Equilibrium – Quiz 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 10 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A force of 120 N is applied perpendicularly on a spanner at a distance of 9 cm from a nut. The torque produced by the force will be A) 12 Nm. B) 10.8 Nm. C) 12.59 Nm. D) 15 Nm. Show Answer Correct Answer: B) 10.8 Nm. 2. 64% of the population has the recessive phenotype. What is the percentage for Rr? A) .04. B) .8. C) .2. D) .64. E) .32. Show Answer Correct Answer: E) .32. 3. Which of the following statements correctly describes any chemical reaction that has reached equilibrium? A) The reaction is now irreversible. B) The rates of the forward and reverse reactions are equal. C) Both forward and reverse reactions have halted. D) The concentrations of products and reactants are equal. Show Answer Correct Answer: B) The rates of the forward and reverse reactions are equal. 4. On an equilibrium graph, what does a shift to the right indicate in a chemical reaction? A) The reaction has stopped. B) The reaction is at equilibrium. C) More products are formed. D) More reactants are formed. Show Answer Correct Answer: C) More products are formed. 5. Which of the following is true for a reaction at equilibrium? A) The concentrations of reactants and products are equal. B) The rates of the forward and reverse reactions are equal. C) The reaction has stopped. D) The temperature of the system is constant. Show Answer Correct Answer: B) The rates of the forward and reverse reactions are equal. 6. As you increase the pressure of a gas, its solubility in a liquid will A) Increase. B) Stay the same. C) Decrease. D) Pressure has no effect on the solubility of a gas in a liquid. Show Answer Correct Answer: A) Increase. 7. The pH of rain water is approximately A) 5.6. B) 7.0. C) 6.5. D) 7.5. Show Answer Correct Answer: A) 5.6. 8. What volume is needed to make a 2.5 M solution if you have 240g of Sodium Hydroxide? A) 6. B) 2.4. C) 0.42. D) 15. Show Answer Correct Answer: B) 2.4. 9. Centre of gravity the point in an object where its weight is balanced A) True. B) False. C) None. D) None of the above. Show Answer Correct Answer: A) True. 10. Consumer's equilibrium is maintained at the point where ..... A) Budget line cuts indifference curve. B) Budget line is tangent to indifference curve. C) Budget line is convex to origin. D) Budget line is parallel to indifference curve. Show Answer Correct Answer: B) Budget line is tangent to indifference curve. 11. Consider the following equilibrium system at constant pressure:2SO$_{2}$(g) + O$_{2}$(g) $\Longleftrightarrow$ A) Only. B) Only. C) And (3) only. D) And (3) only. Show Answer Correct Answer: C) And (3) only. 12. If K$_{c}$ is large that means the concentration of the ..... is high and therefore the concencentration of the ..... is low. A) Species, reactants. B) Reactants, products. C) Products, reactants. D) Species, products. Show Answer Correct Answer: C) Products, reactants. 13. If the reaction quotient Q has a smaller value 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 the reactants. C) The reaction is not at equilibrium, and will make more reactants at the expense of the products. D) The value of K will not increase until it is equal to Q. Show Answer Correct Answer: B) The reaction is not at equilibrium, and will make more products at the expense of the reactants. 14. What is the formula for molarity? A) Moles/grams. B) Moles/kilograms. C) Moles/milliliters. D) Moles/liters. Show Answer Correct Answer: D) Moles/liters. 15. Who defined acids and bases this way:An acid donates a hydrogen ion in a chemical reaction. A) 28 more days of school left!. B) Bronstead-Lowry. C) Lewis. D) Arrhenius. Show Answer Correct Answer: B) Bronstead-Lowry. 16. The type of evolution that Darwin believed in A) Punctuated equilbrium. B) Commensalism. C) Natural selection. D) Gradualism. Show Answer Correct Answer: D) Gradualism. 17. In a closed system, a dynamic equilibrium is established between liquid water and water vapor. What happens if the temperature of the system is increased? A) The equilibrium shifts to favor the formation of more liquid water. B) The equilibrium shifts to favor the formation of more water vapor. C) The equilibrium remains unchanged. D) The system reaches a new equilibrium with equal amounts of liquid and vapor. Show Answer Correct Answer: B) The equilibrium shifts to favor the formation of more water vapor. 18. What are the types of equilibrium?? A) Stable, Instable, Neutral. B) Stable, Neutral, imstable. C) Stable, Unstable, Neutral. D) None. Show Answer Correct Answer: C) Stable, Unstable, Neutral. 19. Two people are pushing a disabled car. One exerts a force of 200 N east, the other a force of 150 N east. What is the net force exerted on the car? A) 350 N east. B) 350 N west. C) 50 N east. D) 50 N west. Show Answer Correct Answer: A) 350 N east. 20. For the reaction ..... N$_{2}$ + O$_{2}$ <=> 2NOIf O$_{2}$ is removed, the concentration of N$_{2}$ will ..... A) Increase. B) Double. C) Decrease. D) Remain the same. Show Answer Correct Answer: A) Increase. 21. What is used to measure a consumer's entire satisfaction or happiness of a choice? A) Total Revenue. B) Marginal cost. C) Total costs. D) Total utility. E) Marginal utility. Show Answer Correct Answer: D) Total utility. 22. What is the effect of a catalyst on the equilibrium position of a reaction as shown on a graph? A) No effect on equilibrium position. B) Shifts to the left. C) Shifts to the right. D) Stops the reaction. Show Answer Correct Answer: A) No effect on equilibrium position. 23. What is the relationship between pH and pOH? A) PH / pOH = 1. B) PH + pOH = 14. C) PH-pOH = 14. D) PH *pOH = 14. Show Answer Correct Answer: B) PH + pOH = 14. 24. Determine the concentration of the Ag+ ion in a saturated solution of silver phosphate (Ag$_{3}$PO$_{4}$). The solubility of silver phosphate at 25$^\circ$is 1.6 x 10$^{-5}$ mol/L. A) 4.8 x 10$^{-5}$ M. B) 3.2 x 10$^{-5}$ M. C) 1.6 x 10$^{-5}$ M. D) 6.4 x 10$^{-5 }$M. Show Answer Correct Answer: A) 4.8 x 10$^{-5}$ M. 25. What will happen if some solid AgNO$_{3}$ is added to a saturated solution of AgCl? A) More solid AgCl will dissolve. B) More solid AgCl will produced. C) There will be no effect on AgCl equilibrium. D) The AgNO$_{3}$ will not dissolve. Show Answer Correct Answer: B) More solid AgCl will produced. 26. A chemical reaction in which products can react to re-form reactants is known as a(n) A) Buffered reaction. B) Reversible reaction. C) Reforming reaction. D) Stoichiometric reaction. Show Answer Correct Answer: B) Reversible reaction. 27. How does temperature generally affect the solubility of solids in liquids? A) Solubility decreases with increasing temperature. B) Solubility first increases then decreases with temperature. C) Temperature has no effect on solubility. D) Solubility increases with increasing temperature. Show Answer Correct Answer: D) Solubility increases with increasing temperature. 28. Who was the one who coined the term "utility" ? A) Marshall. B) Karl Marx. C) David Hume. D) John Stuart Mill. Show Answer Correct Answer: A) Marshall. 29. The demand function and supply function for a good in the market are as follows:Qd = 140-10pQs = 20 + 10pWhat is the Qe? A) 220. B) 60. C) 80. D) 200. Show Answer Correct Answer: C) 80. 30. How does a catalyst affect equilibrium? A) It makes the reaction occur faster, and makes the equilibrium shift to make more products. B) It makes the reaction occur faster, but does not shift the placement of the equilibrium. C) It does not change the rate of the reaction, but makes the equilibrium shift to make more products. D) A catalyst has no effect on the rate of a reaction or the placement of the equilibrium. Show Answer Correct Answer: B) It makes the reaction occur faster, but does not shift the placement of the equilibrium. 31. In the context of equilibrium, what does Le Chatelier's principle predict? A) The system will remain unchanged if a stress is applied. B) The system will adjust to minimize the stress applied to it. C) The system will increase the stress applied to it. D) The system will decrease the stress applied to it. Show Answer Correct Answer: B) The system will adjust to minimize the stress applied to it. 32. Le Chatelier's Principle states that if a chemical system at equilibrium is stressed, A) The system will adjust to increase the stress. B) The system will adjust to reduce the stress. C) The system will not adjust. D) None of the above. Show Answer Correct Answer: B) The system will adjust to reduce the stress. 33. What do you call all of the genes in a population? A) Gene pool. B) Relative Frequency. C) Genetic Drift. D) Allele pool. Show Answer Correct Answer: A) Gene pool. 34. Which of the following salts will have the highest solubility in water? A) A salt with a neutral pH. B) A salt with a low Ksp value. C) A salt with a high molecular weight. D) A salt with a high Ksp value. Show Answer Correct Answer: D) A salt with a high Ksp value. 35. The molar solubility of PbI$_{2}$ is 1.5 x 10$^{-3}$ M. Calculate the value of Ksp for PbI$_{2}$. A) 1.4 x 10$^{-8}$. B) 1.5 x 10$^{-3}$. C) 2.3 x 10$^{-6}$. D) 3.4 x 10$^{-9}$. Show Answer Correct Answer: A) 1.4 x 10$^{-8}$. 36. When an object is heated, it will absorb heat energy and the temperature will A) Decrease. B) Increase. C) All the above. D) None of the above. Show Answer Correct Answer: B) Increase. 37. Blood has an approximate pH of 7.35. What is the pOH of blood? A) 6.65. B) 2.65. C) 7.65. D) 12.65. Show Answer Correct Answer: A) 6.65. 38. A large value of K$_{c }$indicates ..... A) Only products are present at equilibrium. B) More reactants than products at equlibrium. C) Reactants = products. D) More products than reactants at equilibrium. Show Answer Correct Answer: D) More products than reactants at equilibrium. 39. An endothermic reaction is always favored by ..... A) Low Temperature. B) High Temperature. C) Low pressure. D) Not dependent on temperature. Show Answer Correct Answer: B) High Temperature. 40. When quantity supplied is not equal to quantity demanded A) Price ceiling. B) Excess demand. C) Equilibrium. D) Disequilibrium. Show Answer Correct Answer: D) Disequilibrium. 41. A value of K$_{eq}$ greater than 1 means ..... A) Reaction has not yet come to completion. B) Products are favored over reactants. C) Reactants are favored over products. D) The reaction is not in equilibrium. Show Answer Correct Answer: B) Products are favored over reactants. 42. Which of the following compounds has the lowest molar solubility in mol/L in water at 25$^\circ$C? A) CdS Ksp = 3.6 x 10$^{-29}$. B) Sn(OH)$_{2}$ Ksp = 5 x 10$^{-26}$. C) Ag$_{3}$PO$_{4}$ Ksp = 1.8 x 10$^{-18}$. D) Al(OH)$_{3 }$ Ksp = 2 x 10$^{-33}$. Show Answer Correct Answer: A) CdS Ksp = 3.6 x 10$^{-29}$. 43. When Total Utility Declines Marginal Utility A) Became zero. B) Increases. C) Declines. D) Became negative. Show Answer Correct Answer: D) Became negative. 44. In Haber process, 0.60 mol dm$^{-3}$ of nitrogen is mixed with 1.80 mol dm$^{-3}$ of hydrogen in a sealed container at a certain temperature to give ammonia.N$_{2}$(g) + 3H$_{2}$(g) $\Longleftrightarrow$ A) 0.154 mol$^{-2}$ dm$^{6}$. B) 0.265 mol$^{-2}$ dm$^{6}$. C) 1.470 mol$^{-2}$ dm$^{6}$. D) 0.680 mol$^{-2}$ dm$^{6}$. Show Answer Correct Answer: A) 0.154 mol$^{-2}$ dm$^{6}$. 45. A framed structure is Redundant, if the number of members are ..... (2j-3), where j is the number of joints. A) Equal to. B) Less Than. C) Greater Than. D) None. Show Answer Correct Answer: C) Greater Than. 46. What happens to the amount of chemical reactants (measured in Molarity or pressure) as a chemical change progresses "to the right" towards products, aka: "in the forward direction?" A) It stays constant before it reaches equilibrium. B) It goes up before it reaches equilibrium. C) It decreases before it reaches equilibrium. D) None of the above. Show Answer Correct Answer: C) It decreases before it reaches equilibrium. 47. Consider the following equilibrium:C(s) + CO$_{2}$(g) $\Longleftrightarrow$ A) 0.625 mol$^{-1}$ dm$^{3}$. B) 1.95 mol dm$^{-3}$. C) 0.512 mol$^{-1}$ dm$^{3}$. D) 1.60 mol dm$^{-3}$. Show Answer Correct Answer: D) 1.60 mol dm$^{-3}$. 48. In economics Equilibrium refers to ..... (be careful, the answer is sneaky) A) The price at which the quantity demanded equals the quantity supplied. B) Where price is equal to quantity demanded and quantity supplied. C) The price at which the quantity demanded is exactly equal to the quantity supplied and there is no tendency for change. D) None of the above. Show Answer Correct Answer: C) The price at which the quantity demanded is exactly equal to the quantity supplied and there is no tendency for change. 49. The slope of budget line is:- A) Price ratio of the commodity. B) Concave. C) Convex. D) MRS. Show Answer Correct Answer: A) Price ratio of the commodity. 50. Explain the effect on the position of equilibrium of increasing pressure A) Equilibrium position shifts in the direction that forms more gas molecules-more pressure. B) Equilibrium position shifts in the direction that forms fewer gas molecules-less pressure. C) All the above. D) None of the above. Show Answer Correct Answer: B) Equilibrium position shifts in the direction that forms fewer gas molecules-less pressure. 51. Phosphorous trichloride and phosphorous pentachloride equilibrate in the presence of molecular chlorine according to the reaction:PCl$_{3 }$(g) + Cl$_{2}$ (g) $\rightarrow$ PCl$_{5}$ (g)An equilibrium mixture at 450 K contains P$_{PCl3}$=0.224 atm, P$_{Cl2}$ = 0.284 atm, and P$_{PCl5}$ = 4.24 atm. What is the value of Kp at this temperature? A) 66.7. B) 0.270. C) 3.74. D) 8.36. Show Answer Correct Answer: A) 66.7. 52. A car weighing 15, 000 N rests on a 15$^{o}$ hill. Find the components of the force exerted by the car's weight at right angles to the hill A) 14, 489 N. B) 15, 000 N. C) 3882 N. D) 3900 N. Show Answer Correct Answer: B) 15, 000 N. 53. A chemical equilibrium may be established by starting a reaction with ..... A) Reactants only. B) Products only. C) Equal quantities of reactants and products. D) Any quantities of reactants and products. E) All of the above. Show Answer Correct Answer: E) All of the above. 54. What would be the effect of increasing the temperature to the equilibrium of an endothermic reaction? 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: B) Equilibrium shifts to the right. 55. A solution whose pH value is less than 7 will be A) Neutral. B) Acidic. C) Basic. D) Buffer. Show Answer Correct Answer: B) Acidic. 56. Two objects with different temperature in thermal contact will reach thermal equilibrium when ..... A) Both object becomes hotter. B) Both objects become colder. C) Both object reach the same final temperature. D) Net heat transfer other than zero. Show Answer Correct Answer: C) Both object reach the same final temperature. 57. Which of the following statements best describes chemical equilibrium? A) The reaction has stopped completely. B) The rate of the forward reaction is equal to the rate of the reverse reaction. C) The concentration of reactants is higher than that of products. D) The concentration of products is higher than that of reactants. Show Answer Correct Answer: B) The rate of the forward reaction is equal to the rate of the reverse reaction. 58. Which of the following is the correct equilibrium expression for the reaction:$2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g)$ A) $K_c = \frac{[SO_3]}{[SO_2][O_2]}$. B) $K_c = \frac{[SO_2][O_2]}{[SO_3]^2}$. C) $K_c = \frac{[SO_3]^2}{[SO_2]^2[O_2]}$. D) $K_c = \frac{[SO_2]^2[O_2]}{[SO_3]^2}$. Show Answer Correct Answer: C) $K_c = \frac{[SO_3]^2}{[SO_2]^2[O_2]}$. 59. Which of the following scenarios is an example of punctuated equilibrium? A) A species of bird gradually changes its beak shape over millions of years. B) A species of fish remains unchanged for millions of years, then rapidly evolves new traits. C) A species of mammal slowly increases in size over time. D) A species of insect adapts to a new environment over several generations. Show Answer Correct Answer: B) A species of fish remains unchanged for millions of years, then rapidly evolves new traits. 60. Which of the following describes the law of supply? A) An increase in the price of a good will decrease the quantity demanded. B) The price of a good will increase if production input costs increase. C) An increase in taxes will decrease the supply of a good. D) An increase in the number of sellers will increase the supply of a good. E) An increase in the price of a good will increase the quantity supplied. Show Answer Correct Answer: E) An increase in the price of a good will increase the quantity supplied. ← 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