This quiz works best with JavaScript enabled. Home > Class 11 > 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 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When the following equation, N$_{2}$ + O$_{2}$ <$\rightarrow$ 2NO, reaches equilibrium, it has a K$_{c}$ value of 2.7 x 10$^{-18}$. Does the mixture of these molecules contain mostly products or reactants? A) Products, because K$_{c}$ << 1. B) Reactants, because K$_{c}$ << 1. C) Products, because K$_{c}$ >>1. D) Reactants, because K$_{c}$ >>1. Show Answer Correct Answer: B) Reactants, because K$_{c}$ << 1. 2. A uniform beam is 10 meters long and weighs 200N. It is supported at its center. A 300N weight is placed 2 meters from one end. Where should a 100N weight be placed to balance the beam? A) 1 meter from the opposite end. B) 3 meters from the opposite end. C) 5 meters from the opposite end. D) 7 meters from the opposite end. Show Answer Correct Answer: B) 3 meters from the opposite end. 3. A resultant is ..... A) The sum of two or more vectors. B) All the addition you did. C) Combination of forces together. D) What happens when two people get on a scale together. Show Answer Correct Answer: A) The sum of two or more vectors. 4. For the reaction ..... H$_{2 (g) }$ + Cl$_{2 (g) }$<=> 2HCl $_{(g) }$ + heatIf the pressure in the system is increased, the equilibrium position will ..... A) Shift to the left. B) Shift to the right. C) Not shift position at all as 2 mol gas <=> 2 mol gas. D) None of the above. Show Answer Correct Answer: C) Not shift position at all as 2 mol gas <=> 2 mol gas. 5. In the reaction @@ext\{A\} + ext\{B\} ightleftharpoons ext\{C\} + ext\{D\}@@, what happens to the equilibrium position if the concentration of A is increased? A) The equilibrium shifts to the right. B) The equilibrium shifts to the left. C) The equilibrium remains unchanged. D) The reaction stops. Show Answer Correct Answer: A) The equilibrium shifts to the right. 6. What is the common ion effect in solubility equilibrium? A) The increase in solubility of a salt when a common ion is added. B) The decrease in solubility of a salt when a common ion is added. C) The change in color of a solution when a common ion is added. D) The increase in temperature of a solution when a common ion is added. Show Answer Correct Answer: B) The decrease in solubility of a salt when a common ion is added. 7. At equilibrium, concentrations of reactants and products are A) Equal. B) Constant. C) All the above. D) None of the above. Show Answer Correct Answer: B) Constant. 8. When the following equation, N$_{2}$ + 2H$_{2}$ <$\rightarrow$ N$_{2}$H$_{4}$, reaches equilibrium, it has a K$_{c}$ value of 7.4 x 10$^{-26}$. Does the mixture of these molecules contain mostly products or reactants? A) Products, because K$_{c}$ << 1. B) Reactants, because K$_{c}$ << 1. C) Products, because K$_{c}$ >> 1. D) Reactants, because K$_{c}$ >> 1. Show Answer Correct Answer: B) Reactants, because K$_{c}$ << 1. 9. When Marginal Utility is zero what happens to Total Utility? A) Became Zero. B) Became Maximum. C) Became Minimum. D) None of these. Show Answer Correct Answer: B) Became Maximum. 10. The value of Ksp for PbCl$_{2}$ is 1.6 x 10$^{-5}$. What is the lowest concentration of Cl$^{-}$ (aq) that would be needed to begin precipitation of PbCl$_{2}$ (s) in 0.010 M Pb(NO$_{3}$)$_{2}$? A) 1.6 x 10$^{-7}$ M. B) 4.0 x 10$^{-4}$ M. C) 1.6 x 10$^{-3}$ M. D) 2.6 x 10$^{-7}$ M. E) 4.0 x 10$^{-2}$ M. Show Answer Correct Answer: E) 4.0 x 10$^{-2}$ M. 11. Which of the following is NOT true at equilibrium? A) The forward and reverse reactions proceed at the same rate. B) The concentrations of reactants and products do not change. C) The concentration of the reactants is equal to the concentration of the products. D) The forward and reverse reactions continue to occur. Show Answer Correct Answer: C) The concentration of the reactants is equal to the concentration of the products. 12. Which of the following is another name for excess demand? A) Shortage. B) Surplus. C) Equilibrium. D) Disequilibrium. Show Answer Correct Answer: A) Shortage. 13. Any point inside PPC represents:- A) Underutilized resources. B) Fully utilized resources. C) Unattainable of resources. D) All of the above. Show Answer Correct Answer: A) Underutilized resources. 14. A nut can be loosen more easily with A) A short spanner because a large turning effect can be produced. B) A short spanner because a larger force can be produced. C) A heavy spanner because a larger force can be produced. D) Long spanner because a large turning effect can be produced. Show Answer Correct Answer: D) Long spanner because a large turning effect can be produced. 15. 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. 16. Which of the following usually makes a substance dissolve faster in a solvent? A) Adding more solvent to the solution. B) Increasing the particle size of the solute. C) Lowering the temperature. D) Decreasing the number of particles. Show Answer Correct Answer: A) Adding more solvent to the solution. 17. 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. 18. 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. 19. 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) Bi$_{2}$S$_{3}$. B) Ag$_{2}$S. C) HgS. D) Mg(OH)$_{2}$. Show Answer Correct Answer: C) HgS. 20. In a chemical equilibrium involving gases, what effect does increasing the pressure have on the equilibrium position? A) Shifts towards the side with more moles of gas. B) Shifts towards the side with fewer moles of gas. C) No effect on the equilibrium position. D) Increases the rate of the forward reaction only. Show Answer Correct Answer: B) Shifts towards the side with fewer moles of gas. 21. Increasing the concentration increases the speed of reaction by A) Lowering activation energy. B) Increasing collisions. C) Speeding up the reactants. D) Exposing more reactant. Show Answer Correct Answer: B) Increasing collisions. 22. Consider the following reaction:4NH$_{3}$(g) + 5O$_{2}$(g) $\Longleftrightarrow$ A) No unit. B) Mol dm$^{-3}$. C) Mol$^{-1}$ dm$^{3}$. D) Mol$^{-2}$ dm$^{6}$. Show Answer Correct Answer: B) Mol dm$^{-3}$. 23. When an object is experiencing a net torque A) It is in dynamic equilibrium. B) It is in static equilibrium. C) It is rotating. D) It is translating. Show Answer Correct Answer: C) It is rotating. 24. 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. 25. 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. ← 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 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 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