This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 7 Equilibrium – Quiz 16 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 16 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Given the reaction at equilibrium:A(g) + B(g) <=> A$_{2}$B$_{3}$(g) Which change will not affect the equilibrium concentrations of A(g), B(g), and A$_{2}$B$_{3}$(g)? A) Adding more A(g). B) Adding a catalyst. C) Increasing the temperature. D) Increasing the pressure. Show Answer Correct Answer: B) Adding a catalyst. 2. In the Hardy-Weinberg theorem, p refers to what? A) The frequency of the dominant allele. B) The frequency of the homozygous genotype. C) The frequency of the recessive allele. D) The frequency of the homozygous dominant. Show Answer Correct Answer: A) The frequency of the dominant allele. 3. Which of the following shows the correct dissolution reaction for BaCl$_{2}$? A) Ba $^{2+}$(aq) + Cl$_{2}$$^{-}$(aq) $\rightarrow$ BaCl$_{2}$(s). B) BaCl$_{2}$(aq) $\rightarrow$ Ba $^{2+}$(aq) + 2Cl$^{-}$(aq). C) BaCl$_{2}$(s) $\rightarrow$ Ba $^{2+}$(aq) + 2Cl$^{-}$(aq). D) Ba $^{2+}$(aq) + 2Cl$^{-}$(aq) $\rightarrow$ BaCl$_{2}$(s). Show Answer Correct Answer: C) BaCl$_{2}$(s) $\rightarrow$ Ba $^{2+}$(aq) + 2Cl$^{-}$(aq). 4. What type of system are most chemical systems in our world? This makes it more difficult to calculate equilibrium constants? A) Constant Temperature. B) Constante Pressure. C) Constant Concentrations & Pressure of reactants & products. D) Open system. E) Closed system. Show Answer Correct Answer: D) Open system. 5. What term describes the transfer of thermal energy from warmer objects to cooler objects when they come into contact? A) Conduction. B) Radiation. C) Convection. D) Insulation. Show Answer Correct Answer: A) Conduction. 6. Who was the one who first proposed the ordinal utility theory? A) David Ricardo. B) Adam Smith. C) Hicks and Allen. D) John Stuart Mill. Show Answer Correct Answer: C) Hicks and Allen. 7. What does the slope of a line in a phase equilibrium graph represent? A) Rate of phase change. B) Temperature change. C) Pressure change. D) Volume change. Show Answer Correct Answer: A) Rate of phase change. 8. When suppliers enter a market, supply will A) Increase. B) Decrease. C) Stay the same. D) None of the above. Show Answer Correct Answer: A) Increase. 9. Gradualism and punctuated equilibrium are both supported by evidence from the ..... record A) Evolutionary. B) Fossil. C) Binomial nomenclature. D) Darwin. Show Answer Correct Answer: B) Fossil. 10. How many liters would you need to make a 1 M solution if you have 6 mol of Sodium Hydroxide? A) 2. B) 3. C) 4. D) 6. Show Answer Correct Answer: D) 6. 11. How is pH calculated? A) PH is calculated using the formula:pH =-log[H+]. B) PH is calculated using the formula:pH = log[H+]. C) PH is calculated by adding the concentration of H+ ions and OH-ions. D) PH is calculated by multiplyingthe concentration of H+ ions and OH-ions. Show Answer Correct Answer: A) PH is calculated using the formula:pH =-log[H+]. 12. What does dynamic equilibrium mean? A) When forwards and backwards reactions in a reversible reaction are occurring at the same time and rate. B) When products are being made at a constant speed. C) When the products are turning into reactants again. D) None of the above. Show Answer Correct Answer: A) When forwards and backwards reactions in a reversible reaction are occurring at the same time and rate. 13. Given the reaction system in a closed container at equilibrium and at a temperature of 298 K:N$_{2}$O$_{4 }$(g) <$\rightarrow$ 2NO$_{2 }$(g)The measurable quantities of the gases at equilibrium must be A) Decreasing. B) Increasing. C) Equal. D) Constant. Show Answer Correct Answer: D) Constant. 14. A system at equilibrium A) Must have reactants and products. B) Must have products only. C) Must have reactants only. D) None of the above. Show Answer Correct Answer: A) Must have reactants and products. 15. Henry's Law is applicable for A) Solid-liquid equilibrium. B) Solid-gas equilibrium. C) Gas-liquid equilibrium. D) Gas-solution of gas equilibrium. Show Answer Correct Answer: D) Gas-solution of gas equilibrium. 16. Which is the correct equilibrium constant expression for the following reaction? Fe$_{2}$O$_{3(s)}$ + H$_{2(g)}$ $\rightarrow$ Fe$_{(s)}$ + H$_{2}$O$_{(g)}$ A) K = [H$_{2}$O]3 / [H$_{2}$]$^{3}$. B) K = [Fe$_{2}$O$_{3}$] [H$_{2}$]$^{3}$ / [Fe]$^{2}$[H$_{2}$O]$^{3 }$. C) K = [Fe]$^{2}$[H$_{2}$O]$^{3}$ / [Fe$_{2 }$O$_{3}$] [H$_{2}$]$^{3}$. D) K= [Fe] [H$_{2}$O] / [Fe$_{2}$O$_{3}$] [H$_{2}$]. E) K = [H$_{2}$O] / [H$_{2}$]. Show Answer Correct Answer: E) K = [H$_{2}$O] / [H$_{2}$]. 17. A 5 kg object is placed on a horizontal surface. A force of 20N is applied at an angle of 30 degrees to the horizontal. What is the torque about the point of contact? A) 5 Nm. B) 10 Nm. C) 8.66 Nm. D) 17.32 Nm. Show Answer Correct Answer: C) 8.66 Nm. 18. The pH of water at 25oC is nearly A) 12. B) 10. C) 7. D) 4. Show Answer Correct Answer: C) 7. 19. Given the equation representing a reaction at equilibrium:N$_{2}$(g) + 3H$_{2}$(g) $\rightarrow$ 2NH$_{3}$(g) + energyWhich change causes the equilibrium to shift to the right? A) Decreasing the concentration of H$_{2}$(g). B) Decreasing the pressure. C) Increasing the concentration of N$_{2}$(g). D) Increasing the temperature. Show Answer Correct Answer: C) Increasing the concentration of N$_{2}$(g). 20. Some chemical reactions require a substance called a catalyst. The main purpose of a catalyst is A) To warm up the reaction. B) To speed up the reaction. C) To create more reactants. D) To stop the reaction. Show Answer Correct Answer: B) To speed up the reaction. 21. For the reaction ..... H$_{2 (g) }$ + Cl$_{2 (g) }$<$\rightarrow$ 2HCl $_{(g) }$ + heatIf the temperature is cooled, the ..... reaction will be favored. A) Forward. B) Reverse. C) Forward and reverse. D) None of the above. Show Answer Correct Answer: A) Forward. 22. What is the conjugate base of OH$^{-}$? A) O$_{2}$. B) H$_{2}$O. C) O$^{-}$. D) O$^{2-}$. Show Answer Correct Answer: D) O$^{2-}$. 23. Barium carbonate has a measured solubility of 4.0 x 10$^{-5}$ at 25$^\circ$C. Determine the Ksp. A) 5.3 x 10$^{-10}$. B) 6.1 x 10$^{-5}$. C) 9.1 x 10$^{-7}$. D) 1.6 x 10$^{-9}$. Show Answer Correct Answer: D) 1.6 x 10$^{-9}$. 24. What is the key characteristic of a reversible reaction at equilibrium? A) The conversion of reactants into products only. B) The conversion of products into reactants only. C) The forward and reverse reactions occurring simultaneously. D) The absence of any reaction occurring. Show Answer Correct Answer: C) The forward and reverse reactions occurring simultaneously. 25. Which of the following statements about the equilibrium constant (K ..... eq) is true? A) K eq is always greater than 1 for all reactions. B) K eq is independent of temperature. C) K eq is the ratio of the concentration of products to reactants at equilibrium. D) K eq changes with the concentration of reactants. Show Answer Correct Answer: C) K eq is the ratio of the concentration of products to reactants 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 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