This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 7 Equilibrium – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 3 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Only (aq), (l), and (g) appear in an equilibrium expression. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 2. At the start of a reversible process, the reaction proceeds towards the formation of: A) Reactants. B) Products. C) Equilibrium. D) Catalysts. Show Answer Correct Answer: B) Products. 3. Unstable Equilibrium:a kind of equilibrium so that when the object is slightly changed, it go further from its original position. A) True. B) False. C) None. D) None of the above. Show Answer Correct Answer: A) True. 4. What is the effect of catalyst on a reversible reaction? A) Catalyst increases the product of a reaction. B) Catlyst increases the equilibrium constant. C) Catalyst increases the rate of the forward reaction. D) Catalyst increases both the rate of forward and reverse reaction. Show Answer Correct Answer: D) Catalyst increases both the rate of forward and reverse reaction. 5. Keq < 1 A) There are more products than reactants when the reaction reached equilibrium. B) There are more reactants 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 reactants than products when the reaction reached equilibrium. 6. When demand increases, the equilibrium price and quantity supplied will both A) Increase. B) Decrease. C) Stay the same. D) None of the above. Show Answer Correct Answer: A) Increase. 7. Which of the following will never affect the position of an equilibrium? A) The temperature. B) The pressure. C) A catalyst. D) The concentration of reactants. Show Answer Correct Answer: C) A catalyst. 8. How do catalysts increase the rate of reaction? A) The frequency of collisions is the increased. B) The activation energy is lowered. C) The energy of collisions is increased. D) Both the frequency and energy of collisions is increased. Show Answer Correct Answer: B) The activation energy is lowered. 9. The necessary condition in Indifference curve analysis for equilibrium is A) MUx = Px. B) MUx/Px = MUy/Py. C) MRSxy =-P1/P2. D) MRSxy increases. Show Answer Correct Answer: C) MRSxy =-P1/P2. 10. What is the significance of the equilibrium constant $K_{eq}$ A) Indicates the speed of reaction. B) Indicates the extent of reaction. C) Indicates the temperature of reaction. D) Indicates the pressure of reaction. Show Answer Correct Answer: B) Indicates the extent of reaction. 11. Calculate Kc for the reaction HI$_{(g) }$$\rightarrow$ H$_{2(g)}$ + I$_{2(g}$) given that the concentrations of each species at equilibrium are as follows:[HI] = 0.85 mol/L, [I$_{2}$] = 0.60 mol/L, [H$_{2}$] = 0.27mol/L. A) 0.19. B) 0.22. C) 4.5. D) 5.25. E) 160. Show Answer Correct Answer: B) 0.22. 12. Decreasing the temperature of an endothermic reaction will cause A) Equilibria to shift left and K increases. B) Equilibria to shift left and K decreases. C) Equilibria to shift right and K increases. D) Equilibria to shift right and K decreases. Show Answer Correct Answer: B) Equilibria to shift left and K decreases. 13. An equilibrium constant with a value of 4.6 x 10$^{15 }$indicates that at equilibrium A) The reactants are favored. B) The products are favored. C) Approximately equal concentrations of reactants and products are present. D) None of the above. Show Answer Correct Answer: B) The products are favored. 14. Changes in pressure will only affect substances that are in the ..... state. A) Gaseous. B) Liquid. C) Solid. D) Plasma. Show Answer Correct Answer: A) Gaseous. 15. Which will dissolve the fastest? A) Block of salt in cold water. B) Block of salt in hot water. C) Table salt in cold water. D) Table salt in hot water. Show Answer Correct Answer: D) Table salt in hot water. 16. Rate is another word for ..... A) Time. B) Distance. C) Speed. D) Change. Show Answer Correct Answer: C) Speed. 17. Find the net force:15 N to the right, and another 15 newtons to the right. A) 0 N Right. B) 0 N Left. C) 30 N Left. D) 30 N Right. Show Answer Correct Answer: D) 30 N Right. 18. A per-unit tax almost always leads to a decrease in supply. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 19. A technological improvement usually leads to a decrease in supply. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 20. What are the two factors to look for when determining if the reaction is at equilibrium? A) Forward reaction rate is faster than the reverse and concentrations are equal. B) Forward and reverse reaction rates are equal and concentration is constant. C) Forward and revers reaction rates are equal and concentration is equal. D) Forward reaction rate is faster than the reverse and concentration is equal. Show Answer Correct Answer: B) Forward and reverse reaction rates are equal and concentration is constant. 21. The following factors affect the position of equilibrium EXCEPT A) Concentration. B) State of Matter. C) Temperature. D) Pressure. Show Answer Correct Answer: B) State of Matter. 22. What role do environmental changes play in punctuated equilibrium? A) They cause gradual changes in species over time. B) They have no impact on evolutionary processes. C) They trigger rapid evolutionary changes after long periods of stability. D) They lead to the extinction of species without any evolutionary change. Show Answer Correct Answer: C) They trigger rapid evolutionary changes after long periods of stability. 23. Which Hardy-Weinberg equation represents the genotype frequencies in a population? A) P + q = 1. B) P2 + 2pq + q2 = 1. C) P2 + pq2 + q2 = 1. D) P + 2pq + q3 = 1. Show Answer Correct Answer: B) P2 + 2pq + q2 = 1. 24. For the reaction ..... N$_{2 (g) }$+ 3 H$_{2}$ $_{(g)}$ <=> 2 NH$_{3 (g)}$If the pressure in the system is increased, which substance(s) will increase in concentration? A) N$_{2 }$ (as 2 mol gas $\rightarrow$ 4 mol gas). B) H$_{2}$ (as 2 mol gas $\rightarrow$ 4 mol gas). C) N$_{2}$ and H$_{2 }$(as 2 mol gas $\rightarrow$ 4 mol gas). D) NH$_{3}$ (as 4 mol gas $\rightarrow$ 2 mol gas). Show Answer Correct Answer: D) NH$_{3}$ (as 4 mol gas $\rightarrow$ 2 mol gas). 25. Does a bridge anchored resting on two pillars have any torque? A) Yes, but it will soon break because of the torque. B) No, it isn't moving. C) No, Bridges can't have torque. D) Yes, but it is at equilibrium. Show Answer Correct Answer: D) Yes, but it is at equilibrium. ← PreviousNext →Related 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 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 8Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 9Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 10Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books