This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 4 Chemical Kinetics – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 4 Chemical Kinetics Quiz 6 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which S.L graph paper will be appropriate if you wish to plot solubility against reciprocal of absolute temperature for 11mg/ml, 39mg, ml, and 121 mg/ml at 25, 45, and 55 degrees Celsius respectively? A) Two cycles. B) One cycle. C) Three cycles. D) Log paper. Show Answer Correct Answer: A) Two cycles. 2. What is the function of catalyst in the reaction? A) Decoration in the chemical reaction. B) Provides an alternative pathway which has a lower activation energy. C) Supply energy to the chemical reaction. D) The compulsory substance to complete chemical reaction. Show Answer Correct Answer: B) Provides an alternative pathway which has a lower activation energy. 3. Which of the following statements about the Arrhenius equation is correct? A) The rate constant increases with decreasing activation energy. B) The rate constant decreases with increasing temperature. C) The rate constant is independent of temperature. D) The activation energy has no effect on the rate constant. Show Answer Correct Answer: A) The rate constant increases with decreasing activation energy. 4. A type of system which allows exchange of energy but not matter with its surroundings A) Open. B) Closed. C) Isolated. D) Universal. Show Answer Correct Answer: B) Closed. 5. The value of change of enthalpy is ..... if the heat flow from the system to the surroundings A) Positive. B) Negative. C) Unchanged. D) None of the above. Show Answer Correct Answer: B) Negative. 6. In the given reaction A $\rightarrow$ B. When conc. of A is changed from 0.1 M to1M. then rate of reaction increases by a factor of 100. what is the order of the reaction with respect to A A) 10. B) 1. C) 2. D) 3. Show Answer Correct Answer: C) 2. 7. Covid 19 is due to A) Virus. B) Bacteria. C) Fungi. D) None. Show Answer Correct Answer: A) Virus. 8. What is the half life of a first order reaction if its rate constant 2 minutes-1 A) 3.5 mintunes. B) 0.35 minutes. C) 5.3 minutes. D) 0.53 minutes. Show Answer Correct Answer: A) 3.5 mintunes. 9. The ..... the surface area of the reactants, the faster the reaction rate. A) Larger. B) Smaller. C) All the above. D) None of the above. Show Answer Correct Answer: A) Larger. 10. The first order reaction is 50% completed in 69.3 minutes, then time required for 99.9% completion of this reaction is A) 693 minute. B) 6.93 minute. C) 0.693 minute. D) 6930 minute. Show Answer Correct Answer: A) 693 minute. 11. A chemical applied to fruit to stop it from rotting is an example of a(n) A) Inhibitor. B) Catalyst. C) Transition state. D) Emulsifier. Show Answer Correct Answer: A) Inhibitor. 12. A first order reaction is 50% complete in 25 min Calculate the time required for completeion of 80% of reaction A) 58.06. B) 57.06. C) 59.06. D) None of the above. Show Answer Correct Answer: B) 57.06. 13. Aiden, David, and Scarlett are working on a school project about chemical reactions. They are trying to determine the rate law for a particular reaction. How should they go about this? A) By conducting an experiment. B) By examining the coefficients in the balanced chemical equation of the reaction. C) By deriving it from the equilibrium constant of the reaction. D) By calculating it from the rates of forward and reverse reactions of the system in equilibrium. Show Answer Correct Answer: A) By conducting an experiment. 14. Units of rate constant for first order reaction is A) Per second. B) Per litre. C) Per mol. D) None of the above. Show Answer Correct Answer: A) Per second. 15. What does kinetics mainly study? A) Concentration of (aq) mixtures. B) Pressure of (g) mixtures. C) How much products are produced. D) Reaction rates. Show Answer Correct Answer: D) Reaction rates. 16. The unit of rate and rate constant are same for ..... order reaction A) Zero. B) One. C) Two. D) Three. Show Answer Correct Answer: A) Zero. 17. The rate equation for the dimerization of NO2 is $\frac{-\Delta\left[NO_2\right]}{\Delta t}=k\left[NO_2\right]2$ A) Adding an inert gases to the mixture. B) Adding more NO$_{2}$ to the reaction mixture. C) Increasing the temperature of the reaction vessel. D) Decreasing the volume of the reaction vessel. Show Answer Correct Answer: C) Increasing the temperature of the reaction vessel. 18. The order of reaction is based from non-experimental data A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 19. What is the meaning of the rate of reaction? A) Decrease in amount of product. B) Decrease in amount of product against time. C) Increase in amount of products against time. D) Increase in amount of reactants against time. Show Answer Correct Answer: C) Increase in amount of products against time. 20. What is the Value of rate constant at extremly high temperature i.e infinte. A) K=A. B) K=o. C) K becomes infinte. D) None of these. Show Answer Correct Answer: A) K=A. 21. If we plot log k Vs 1/T, by Arrhenius equation, the slope is A) -Ea/R. B) +Ea/R. C) -Ea/2.303R. D) +Ea/2.303R. Show Answer Correct Answer: C) -Ea/2.303R. 22. A catalyst which is in a different physical state from the reaction it catalyzes is a ..... catalyst. A) Heterogeneous. B) Homogeneous. C) Inhibitor. D) Transition. Show Answer Correct Answer: A) Heterogeneous. 23. The half-life of a first-order reaction is 10 minutes. What is the time required for 75% of the reactant to decompose? A) 10min. B) 20min. C) 30min. D) 40 min. Show Answer Correct Answer: B) 20min. 24. The rate of reaction is doubled when the concentration of a reactant is doubled. The order of the reaction with respect to this reactant is: A) 0. B) 1. C) 2. D) 3. Show Answer Correct Answer: B) 1. 25. It is the study of reaction rates and the mechanism or step sequence under which reactions occur; A) Chemical kinetics. B) Chemical emetics. C) Thermodynamics. D) Chemical mechanics. Show Answer Correct Answer: A) Chemical kinetics. ← 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 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 10Class 12 Chemistry (Part I) Chapter 4 Chemical Kinetics Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books