This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 7 Equilibrium – Quiz 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 14 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If a body is in equilibrium and a 30 N force is acting on it to the East, what other force must also be acting on it? A) 30N west. B) 30Lb west. C) 30.N east. D) 30.N west. Show Answer Correct Answer: A) 30N west. 2. This slows down or even stops a chemical reaction. A) De-activator. B) Catalyst. C) Enzyme. D) Inhibitor. Show Answer Correct Answer: D) Inhibitor. 3. In the reaction @@ext\{A\} + ext\{B\} ightleftharpoons ext\{C\} + ext\{D\}@@, the equilibrium constant expression is given by: A) $K_{eq} = \frac{[\text{A}][\text{B}]}{[\text{C}][\text{D}]}$. B) $K_{eq} = \frac{[\text{C}][\text{D}]}{[\text{A}][\text{B}]}$. C) $K_{eq} = \frac{[\text{C}]}{[\text{A}][\text{B}]}$. D) $K_{eq} = \frac{[\text{A}]}{[\text{C}][\text{D}]}$. Show Answer Correct Answer: B) $K_{eq} = \frac{[\text{C}][\text{D}]}{[\text{A}][\text{B}]}$. 4. What role did Cato Guldberg and Peter Waage play in understanding chemical equilibrium? A) They discovered the law of mass action. B) They formulated the concept of the equilibrium constant. C) They developed the method for measuring equilibrium concentrations. D) They studied the reaction between NO2 and N2O4. Show Answer Correct Answer: B) They formulated the concept of the equilibrium constant. 5. The following solution mixture which is not buffer is ..... A) NaH$_{2}$PO$_{4}$ and Na$_{2}$HPO$_{4}$. B) NH$_{3 }$and (NH$_{4}$)$_{2}$SO$_{4}$. C) HCOOH and Ba(HCOO)$_{2}$. D) H$_{3}$PO$_{4}$ and NaH$_{2}$PO$_{4}$. E) NaOH and Ba(HCOO)$_{2}$. Show Answer Correct Answer: A) NaH$_{2}$PO$_{4}$ and Na$_{2}$HPO$_{4}$. 6. An increase in supply causes the supply curve to shift to the A) Right. B) Left. C) No change. D) None of the above. Show Answer Correct Answer: A) Right. 7. Which of the following is an example of a real-world application of solubility equilibrium? A) The formation of stalactites and stalagmites. B) The boiling of water. C) The melting of ice. D) The freezing of water. Show Answer Correct Answer: A) The formation of stalactites and stalagmites. 8. For the reaction ..... SO$_{2}$ + O$_{2}$ <$\rightarrow$ SO$_{3}$If the equilibrium shifts to the the concentration of O$_{2}$ will ..... A) Increase. B) Decrease. C) Remain the same. D) Double. Show Answer Correct Answer: B) Decrease. 9. An exothermic reaction is allowed to reach equilibrium. If heat energy is then removed, the equilibrium will shift A) Toward the middle. B) Toward the reactant side. C) Toward the product side. D) None of the above. Show Answer Correct Answer: C) Toward the product side. 10. Le Chatelier's Principle states that: A) A disturbing force must be applied to a system in order for it to reach equilibrium. B) When a system at equilibrium is disturbed, a new equilibrium constant is established. C) When a chemical system at equilibrium is disturbed, the system shifts in order to minimize the effect. D) When a chemical system is at equilibrium it is no longer possible to alter the system. Show Answer Correct Answer: C) When a chemical system at equilibrium is disturbed, the system shifts in order to minimize the effect. 11. An equilibrium constant with a large value, e.g. K$_{eq}$ = 1000, indicates ..... A) A very fast reaction. B) Mostly products at equilibrium. C) Mostly reactants at equilibrium. D) Nothing useful at all. Show Answer Correct Answer: B) Mostly products at equilibrium. 12. A decrease in temperature shifts the reaction A) Left (towards reactants). B) Right (towards products). C) Does not affect equilibrium. D) None of the above. Show Answer Correct Answer: A) Left (towards reactants). 13. Species acting as both Bronsted acid and base is A) (HSO$_{4}$) $^{-}$. B) Na2CO3. C) NH3. D) OH-. Show Answer Correct Answer: A) (HSO$_{4}$) $^{-}$. 14. What does a steep slope in a solubility equilibrium graph indicate? A) High solubility. B) Low solubility. C) No solubility. D) Variable solubility. Show Answer Correct Answer: A) High solubility. 15. Who was the scientist who discussed changes in equilibrium? A) Newton. B) Bob. C) Goldberg. D) Le Chatelier. Show Answer Correct Answer: D) Le Chatelier. 16. What states of matter are omitted when writing K$_{eq }$expressions? A) Solids and liquids. B) Aqueous solutions and gas. C) Solids, liquids, aqueous solutions and gases. D) Aqueous solutions & liquids. Show Answer Correct Answer: A) Solids and liquids. 17. What happens to the solubility of a gas in a liquid if the temperature is increased? A) The solubility increases. B) The solubility decreases. C) The solubility remains the same. D) The solubility first increases then decreases. Show Answer Correct Answer: B) The solubility decreases. 18. In an equilibrium graph of a physical process, what does the area under the curve represent? A) Total energy. B) Total time. C) Total mass. D) Total volume. Show Answer Correct Answer: A) Total energy. 19. A sudden shortage of a good A) Rationing. B) Black market. C) Supply shock. D) Free market. Show Answer Correct Answer: C) Supply shock. 20. The first four dinner rolls Joan consumes have total utility of 15, 27, 37, and 45 respectively. What is the marginal utility of the 4th dinner roll? A) 124 units of utility. B) 45 units of utility. C) 11.25 units of utility. D) 8 units of utility. Show Answer Correct Answer: D) 8 units of utility. 21. Determine the expected numbers of organisms with genotype BB if the frequencies are as follows in a population with a total size of 150:f(BB)=0.16, f(Bb)=0.48, and f(bb)=0.36. A) 24. B) 72. C) 54. D) 150. Show Answer Correct Answer: A) 24. 22. Equation of Budget Line is A) P1X1+P2X2 B) P1X1+P2X2 = M. C) P1X1+P2X2 >M. D) P1X1+P2X2 <= M. Show Answer Correct Answer: B) P1X1+P2X2 = M. 23. Increase in temperature of the reactants can do one of the following A) Slow collision frequency. B) Allow less effective collision between the particles. C) Cause particles to lose speed. D) Increase collision between the particles thus increasing the rate. Show Answer Correct Answer: D) Increase collision between the particles thus increasing the rate. 24. 2A + 3B <$\rightarrow$ 2ABThe reverse reaction points towards the ..... A) Left. B) Right. C) Up. D) Down. Show Answer Correct Answer: A) Left. 25. Which of the following factors has no effect on the position of the chemical equilibrium for a reaction? A) Pressure. B) Temperature. C) Catalyst. D) Concentration. Show Answer Correct Answer: C) Catalyst. ← 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 8Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 9Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books