This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 4 Chemical Kinetics – Quiz 22 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 4 Chemical Kinetics Quiz 22 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following statements is not correct about order of a reaction? A) The order of a reaction can be a fractional number . B) Order of a reaction is experimentally determined quantity. C) The order of a reaction is always equal to the sum of the stoichiometric coefficients of reactants in the balanced chemical equation for a reaction. D) The order of a reaction is the sum of the powers of molar concentration of the reactants in the rate law expression. Show Answer Correct Answer: C) The order of a reaction is always equal to the sum of the stoichiometric coefficients of reactants in the balanced chemical equation for a reaction. 2. For second order reaction, the initial concentration of reactant A is 0.24 M. If the rate constant is 8.1 x 10$^{-2}$ M$^{-1}$ s$^{-1}$, what is the concentration of A after 29 seconds? A) 0.02 M. B) 0.15 M. C) 0.30 M. D) 0.45 M. Show Answer Correct Answer: B) 0.15 M. 3. If a reaction is first order in A and zero order in B, the rate law can be written as: A) Rate = k[A]. B) Rate = k[A][B]. C) Rate = k[B]. D) Rate = k[A]$^\circ$[B]. Show Answer Correct Answer: A) Rate = k[A]. 4. To measure rate of reaction, either decreasing mass of solid reactant or increasing volume of gaseous products are used. Which of the following reactions uses increasing volume of gaseous product method to measure the its rate? A) Reaction between iron metal and air. B) Reaction between sodium hydroxide and nitric acid. C) Reaction between table salt and water. D) Reaction between hydrochloric acid and aluminum metal. Show Answer Correct Answer: D) Reaction between hydrochloric acid and aluminum metal. 5. Given the chemical equation, Haber Prosess N$_{2}$(g) + 3H$_{2}$ (g) $\rightarrow$ 2NH$_{3 }$(g)Based on this reaction, first order for concentration N$_{2}$ and zero order for concentration H$_{2}$.Write rate law: A) Rate = K [N$_{2}$]$^{1}$ [H$_{2}$]$^{1}$. B) Rate = K [N$_{2}$]$^{1}$. C) Rate = K [H$_{2}$]$^{0}$. D) Rate = K [N$_{2}$]$^{1}$ [H$_{2}$]$^{3}$. Show Answer Correct Answer: B) Rate = K [N$_{2}$]$^{1}$. 6. In ..... state rate of the reaction is maximum A) Powdered state. B) Plasma state. C) Liquid state. D) Gas state. Show Answer Correct Answer: A) Powdered state. 7. Consider this reaction:2SO$_{2(g) }$+ O$_{2(g)}$ $\rightarrow$ A) 0.035. B) 0.025. C) 0.120. D) 0.050. Show Answer Correct Answer: B) 0.025. 8. For a first-order reaction with a half-life of 30 minutes, what fraction of reactant remains after 90 minutes? A) 1/2. B) 1/4. C) 1/8. D) 1/16. Show Answer Correct Answer: C) 1/8. 9. Baking a turkey in an oven is an ..... A) Exothermic Reaction. B) Endothermic Reaction. C) All the above. D) None of the above. Show Answer Correct Answer: B) Endothermic Reaction. 10. Under suitable conditions it is possible to form solutions that contain a greater amount of solvent than needed to form a saturated solution. Such solutions are supersaturated. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 11. For the elementary reaction the rate ofdisappearance of M increases by a factor of 8 upondoubling the concentration of M. The order of the reactionwith respect to M is: A) 1. B) 3. C) 2. D) 4. Show Answer Correct Answer: B) 3. 12. Which of the following factors increases only the effectiveness of collisions? A) Temperature. B) Catalysts. C) Concentration. D) Particle size. Show Answer Correct Answer: B) Catalysts. 13. What is the effect of concentration on reaction rates? A) Concentration has no effect on reaction rates. B) Higher concentration decreases reaction rates. C) Lower concentration increases reaction rates. D) Higher concentration increases reaction rates. Show Answer Correct Answer: D) Higher concentration increases reaction rates. 14. What factors effect rate of reaction? A) Temperature, Concentration, Pressure and Energy. B) Surface Area, Concentration, Energy and Pressure. C) Temperature, Pressure, Concentration and Surface area. D) Pressure, Surface area, Density and Energy. Show Answer Correct Answer: C) Temperature, Pressure, Concentration and Surface area. 15. In an experiment, a student observes that increasing the concentration of a reactant doubles the rate of reaction. What is the order of the reaction with respect to that reactant? A) Zero order. B) First order. C) Second order. D) Third order. Show Answer Correct Answer: B) First order. 16. The reactions of high order are rare because A) Many body collisions involve very high activation energy. B) Many body collisions have a very low probability. C) Many body collisions are not energetically favoured. D) Many body collisions can take place in gaseous phase only. Show Answer Correct Answer: B) Many body collisions have a very low probability. 17. What is the definition of chemical kinetics? A) Chemical kinetics is the study of the rates of chemical reactions and the factors that influence them. B) Chemical kinetics is the analysis of the physical properties of substances. C) Chemical kinetics is the study of the structure of molecules. D) Chemical kinetics focuses on the equilibrium of chemical reactions. Show Answer Correct Answer: A) Chemical kinetics is the study of the rates of chemical reactions and the factors that influence them. 18. For a reaction P + Q $\rightarrow$ 2 R + S, the incorrect statement is A) Rate of disappearance of P = Rate of appearance of S. B) Rate of disappearance of Q = 2 x Rate of appearance of R. C) Rate of disappearance of Q = Rate of disappearance of P. D) Rate of disappearance of Q = 1/2 x Rate of appearance of R. Show Answer Correct Answer: C) Rate of disappearance of Q = Rate of disappearance of P. 19. When the galvanic cell reached at equilibrium then what will happen A) E$^{0}$cell=0. B) Ecell=0. C) Delta G$^{o }$=0. D) None of thes. Show Answer Correct Answer: B) Ecell=0. 20. A huge amount of the catalyst is always required to catalyse any reactants. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 21. Rate of a zero order degradation reaction (dC/dt) is plotted against initial concentration. What would the trend of the resulting profile be? A) A declining curve. B) Declining straight line. C) Inclining straight line. D) A flat straight line parallel to the x-axis. Show Answer Correct Answer: D) A flat straight line parallel to the x-axis. 22. A 1-cubic-centimeter cube of sodium reacts more rapidly in water at 25$^\circ$C than does a 1-cubic-centimeter cube of calcium at 25$^\circ$C. The difference in rate of reaction is most closely associated with the different A) Surface area of the metal cubes. B) Nature of the metals. C) Density of the metals. D) Concentration of the metals. Show Answer Correct Answer: B) Nature of the metals. 23. What is collision theory? A) Molecules must collide in the correct orientation with enough energy to bond. B) Molecules need enough energy to collide and react. C) Atoms constantly collide and react. D) The minimum energy needed for atoms to react. Show Answer Correct Answer: A) Molecules must collide in the correct orientation with enough energy to bond. 24. For a zero-order reaction with a rate constant k=0.1 mol/L/s, how long will it take for the concentration to decrease from 0.5 mol/L to 0.2 mol/L? A) 3 sec. B) 5 sec. C) 10 sec. D) 12 sec. Show Answer Correct Answer: B) 5 sec. 25. If two reactants collided with energy but no reaction occurred, what would the most like explanation be? A) The collision was too soft. B) The colliding particles were in the incorrect orientation. C) The colliding particles were in the correct orientation. D) The colliding particles were too big. Show Answer Correct Answer: B) The colliding particles were in the incorrect orientation. ← PreviousNext →Related QuizzesClass 12 Chemistry (Part I) Chapter 4 Chemical Kinetics Quiz 1Class 12 Chemistry (Part I) Chapter 4 Chemical Kinetics Quiz 2Class 12 Chemistry (Part I) Chapter 4 Chemical Kinetics Quiz 3Class 12 Chemistry (Part I) Chapter 4 Chemical Kinetics Quiz 4Class 12 Chemistry (Part I) Chapter 4 Chemical Kinetics Quiz 5Class 12 Chemistry (Part I) Chapter 4 Chemical Kinetics Quiz 6Class 12 Chemistry (Part I) Chapter 4 Chemical Kinetics Quiz 7Class 12 Chemistry (Part I) Chapter 4 Chemical Kinetics Quiz 8Class 12 Chemistry (Part I) Chapter 4 Chemical Kinetics Quiz 9Class 12 Chemistry (Part I) Chapter 4 Chemical Kinetics Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books