This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 7 Equilibrium – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 7 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. Which of the following shows the correct dissolution reaction for BaCl$_{2}$? A) BaCl$_{2}$(s) $\rightarrow$ Ba $^{2+}$(aq) + 2Cl$^{-}$(aq). B) Ba $^{2+}$(aq) + 2Cl$^{-}$(aq) $\rightarrow$ BaCl$_{2}$(s). C) BaCl$_{2}$(aq) $\rightarrow$ Ba $^{2+}$(aq) + 2Cl$^{-}$(aq). D) Ba $^{2+}$(aq) + Cl$_{2}$$^{-}$(aq) $\rightarrow$ BaCl$_{2}$(s). Show Answer Correct Answer: A) BaCl$_{2}$(s) $\rightarrow$ Ba $^{2+}$(aq) + 2Cl$^{-}$(aq). 3. What type of system are most chemical systems in our world? This makes it more difficult to calculate equilibrium constants? A) Constant Concentrations & Pressure of reactants & products. B) Constant Temperature. C) Open system. D) Constante Pressure. E) Closed system. Show Answer Correct Answer: C) Open system. 4. What term describes the transfer of thermal energy from warmer objects to cooler objects when they come into contact? A) Conduction. B) Insulation. C) Radiation. D) Convection. Show Answer Correct Answer: A) Conduction. 5. 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. 6. What does the slope of a line in a phase equilibrium graph represent? A) Rate of phase change. B) Pressure change. C) Temperature change. D) Volume change. Show Answer Correct Answer: A) Rate of phase change. 7. 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. 8. Gradualism and punctuated equilibrium are both supported by evidence from the ..... record A) Fossil. B) Binomial nomenclature. C) Evolutionary. D) Darwin. Show Answer Correct Answer: A) Fossil. 9. How many liters would you need to make a 1 M solution if you have 6 mol of Sodium Hydroxide? A) 4. B) 3. C) 2. D) 6. Show Answer Correct Answer: D) 6. 10. 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+]. 11. 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. 12. 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) Constant. B) Increasing. C) Equal. D) Decreasing. Show Answer Correct Answer: A) Constant. 13. 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. 14. Henry's Law is applicable for A) Solid-liquid equilibrium. B) Gas-liquid equilibrium. C) Solid-gas equilibrium. D) Gas-solution of gas equilibrium. Show Answer Correct Answer: D) Gas-solution of gas equilibrium. 15. 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]$^{2}$[H$_{2}$O]$^{3}$ / [Fe$_{2 }$O$_{3}$] [H$_{2}$]$^{3}$. C) K = [H$_{2}$O] / [H$_{2}$]. D) K = [Fe$_{2}$O$_{3}$] [H$_{2}$]$^{3}$ / [Fe]$^{2}$[H$_{2}$O]$^{3 }$. E) K= [Fe] [H$_{2}$O] / [Fe$_{2}$O$_{3}$] [H$_{2}$]. Show Answer Correct Answer: C) K = [H$_{2}$O] / [H$_{2}$]. 16. 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) 8.66 Nm. B) 10 Nm. C) 17.32 Nm. D) 5 Nm. Show Answer Correct Answer: A) 8.66 Nm. 17. The pH of water at 25oC is nearly A) 4. B) 10. C) 7. D) 12. Show Answer Correct Answer: C) 7. 18. 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) Increasing the concentration of N$_{2}$(g). B) Increasing the temperature. C) Decreasing the pressure. D) Decreasing the concentration of H$_{2}$(g). Show Answer Correct Answer: A) Increasing the concentration of N$_{2}$(g). 19. Some chemical reactions require a substance called a catalyst. The main purpose of a catalyst is A) To warm up the reaction. B) To create more reactants. C) To speed up the reaction. D) To stop the reaction. Show Answer Correct Answer: C) To speed up the reaction. 20. 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. 21. What is the conjugate base of OH$^{-}$? A) O$_{2}$. B) O$^{-}$. C) O$^{2-}$. D) H$_{2}$O. Show Answer Correct Answer: C) O$^{2-}$. 22. Barium carbonate has a measured solubility of 4.0 x 10$^{-5}$ at 25$^\circ$C. Determine the Ksp. A) 6.1 x 10$^{-5}$. B) 5.3 x 10$^{-10}$. C) 1.6 x 10$^{-9}$. D) 9.1 x 10$^{-7}$. Show Answer Correct Answer: C) 1.6 x 10$^{-9}$. 23. 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. 24. 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. 25. If a firm can use the same resources to produce goods A and B and good A is selling at a higher price, what will happen to the supply of good B? A) It will decrease. B) It will increase. C) It will not change. D) None of the above. Show Answer Correct Answer: A) It will decrease. 26. 2A + 3B <$\rightarrow$ 2ABThe reverse reaction forms the substance ..... A) AB. B) A. C) B. D) A + B. Show Answer Correct Answer: D) A + B. 27. What conditions that must be met in order for a chemical reaction to take place? A) Collisions with the proper orientation. B) Sufficient activation energy. C) Appropriate coefficient of friction. D) Both collisions with the proper orientation and sufficient energy. Show Answer Correct Answer: D) Both collisions with the proper orientation and sufficient energy. 28. What symbol shows that a reaction is reversible? A) $=$. B) $\leftarrow$. C) $\leftrightarrow$. D) $\rightarrow$. Show Answer Correct Answer: C) $\leftrightarrow$. 29. Dynamic equilibrium:An object experiencing balanced forces while at a constant velocity A) True. B) False. C) No answer. D) None of the above. Show Answer Correct Answer: A) True. 30. A population is in Hardy-Weinberg equilibrium. The gene of interest has two alleles, with 16% of the population portraying the recessive phenotype. Which percentage of the population is heterozygous? A) 24%. B) 36%. C) 16%. D) 48%. Show Answer Correct Answer: D) 48%. 31. If the equilibrium constant is less than 1, it means that A) Products are favored. B) Reactants are favored. C) All the above. D) None of the above. Show Answer Correct Answer: B) Reactants are favored. 32. What is meant by the "entropy" of a system? A) Entropy refers to the total amount of energy in the system. B) Entropy refers to the quickness with which a system will reach equilibrium. C) Entropy refers to the average kinetic energy of the particles in a system. D) Entropy refers to the degree of disorder in the system. Show Answer Correct Answer: D) Entropy refers to the degree of disorder in the system. 33. Discuss the factors that can affect the equilibrium of a chemical reaction. A) Color of the reactants. B) Size of the reaction vessel. C) Time of day. D) Concentration, temperature, pressure, and catalysts. Show Answer Correct Answer: D) Concentration, temperature, pressure, and catalysts. 34. Which of the following is a Lewis acid? A) PH$_{3}$. B) NF$_{3}$. C) NaH. D) B(CH$_{3}$)$_{3}$. Show Answer Correct Answer: D) B(CH$_{3}$)$_{3}$. 35. Angle made by resultant of normal reaction and frictional force with vertical is called as ..... A) Angle of friction. B) Angle of repose. C) Both a & b. D) None of the above. Show Answer Correct Answer: A) Angle of friction. 36. In the thermal decomposition of hydrated copper sulfate, which direction is the forward reaction? A) Exothermic. B) Endothermic. C) It does not have a direction. D) It depends on the temperature. Show Answer Correct Answer: B) Endothermic. 37. If the wage rate of workers producing a good decreases, then which of the following will most likely occur? A) The demand curve will shift to the right. B) The supply of the good will increase. C) The quantity supplied of the good will decrease. D) Demand for the good will increase. E) Quantity demanded for the good will decrease. Show Answer Correct Answer: B) The supply of the good will increase. 38. For the following equilibrium reaction:N$_{2 }$(g) + 3 H$_{2}$ (g) <==> 2 NH$_{3}$ (g) $\Delta$H=-386 kJ/molPredict the direction that the reaction will proceed, or shift, if ..... NH$_{3}$ is removed A) Right. B) Left. C) No effect. D) None of the above. Show Answer Correct Answer: A) Right. 39. Ammonia gas dissolves in water to give NH4OH. In this reaction water acts as A) A conjugate base. B) A salt. C) A base. D) An acid. Show Answer Correct Answer: D) An acid. 40. An equilibrium constant, K$_{eq}$ is defined as A) [reactant] / [product]. B) Reactant concentrations-product concentrations. C) Product concentrations-reactant concentrations. D) [product] / [reactant]. Show Answer Correct Answer: D) [product] / [reactant]. 41. Which of the following statements is true about the effect of temperature on chemical equilibrium? A) Increasing temperature always shifts the equilibrium to the right. B) Decreasing temperature always shifts the equilibrium to the left. C) Temperature has no effect on chemical equilibrium. D) Increasing temperature favors the endothermic reaction direction. Show Answer Correct Answer: D) Increasing temperature favors the endothermic reaction direction. 42. 64% of the population has the recessive phenotype. What is the percentage of the recessive genotype? A) .64. B) .04. C) .32. D) .8. E) .2. Show Answer Correct Answer: A) .64. 43. In a spontaneous process, the free energy A) Increases. B) Decreases. C) Remain the same. D) None of the above. Show Answer Correct Answer: B) Decreases. 44. Angle made by the plane with horizontal at which body is in impending motion is called as ..... A) Angle of friction. B) Angle of repose. C) Both a & b. D) None of the above. Show Answer Correct Answer: B) Angle of repose. 45. The condition where two substances in physical contact with each other exchange no heat energy. They are said to be the same temperature. A) Energy Transfer. B) Thermal Equilibrium. C) Cooler to Warmer. D) Thermal Energy. Show Answer Correct Answer: B) Thermal Equilibrium. 46. If the Q < K, ..... A) The reaction is at equilibrium and no change will occur. B) The reaction is not at equilibrium, reaction shift to the right and will make more products. C) The reaction is not at equilibrium, reaction shift to the left and will make more reactants. D) The value of K will increase until it is equal to Q. Show Answer Correct Answer: B) The reaction is not at equilibrium, reaction shift to the right and will make more products. 47. Indifference map is the set of A) Indifference Set. B) Both of these. C) Indifference curve. D) None of the Above. Show Answer Correct Answer: C) Indifference curve. 48. The transfer of energy by waves or particles is called A) Conduction. B) Insulation. C) Radiation. D) Convection. Show Answer Correct Answer: C) Radiation. 49. Which term is used to describe equilibrium between different substances as reactants and products? A) Dynamic equilibrium. B) Physical equilibrium. C) Chemical equilibrium. D) Irreversible equilibrium. Show Answer Correct Answer: C) Chemical equilibrium. 50. In which analysis Utility can be measured in numbers? A) Ordinal Analysis. B) Cardinal Analysis. C) Utility Analysis. D) None of these. Show Answer Correct Answer: B) Cardinal Analysis. 51. A closed system ..... A) Allows particles in but not out. B) Allows particles out but not in. C) Allows particles in and out. D) Doesn't allow particles in or out. Show Answer Correct Answer: D) Doesn't allow particles in or out. 52. Which of the following changes will NOT alter the value of K$_{c}$ of an equilibrium reaction?(1) Change in temperature(2) Change in pressure(3) Change in concentration A) And (2) only. B) And (3) only. C) And (3) only. D) , (2) and (3). Show Answer Correct Answer: B) And (3) only. 53. Slope of the Indifference Curve is A) Price Ratio. B) MRSxy. C) MRTxy. D) None of these. Show Answer Correct Answer: B) MRSxy. 54. For the reaction ..... N$_{2}$ + O$_{2}$ <=> 2NO:$\Delta$ H = +182 kJ mol$^{-1}$.If the temperature is increased the equilibrium position will shift ..... A) To the left. B) To the right. C) To the left and right. D) Neither left nor right. Show Answer Correct Answer: B) To the right. 55. Exothermic reactions release heat to the surroundings. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 56. Which of the following must be true when the marginal is negative? A) The average is positive. B) The average is negative. C) The total is decreasing. D) The total is negative. Show Answer Correct Answer: C) The total is decreasing. 57. In equilibrium reactions, we use the ..... as an exponent A) Molar concentration. B) Reactants. C) Number of moles. D) Products. Show Answer Correct Answer: C) Number of moles. 58. MnO2 is used as a catalyst in the decomposition of hydrogen peroxide into hydrogen gas and oxygen gas. Increasing the concentration of MnO2 would cause the equilibrium to A) Shift to the left. B) Shift to the right. C) There would be no effect. D) None of the above. Show Answer Correct Answer: C) There would be no effect. 59. An aqueous solution of CH3COONa will be A) None of these. B) Alkaline. C) Acidic. D) Neutral. Show Answer Correct Answer: B) Alkaline. 60. Dynamic Equilibrium means ..... A) Objects moving at constant speed in a straight-line path. B) Objects at rest. C) Flying in outer space. D) Force of friction. Show Answer Correct Answer: A) Objects moving at constant speed in a straight-line path. ← 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 8Class 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books