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| Chemistry 11th Chapter 11 Reaction Kinetics Questions Bank |
Chemistry 1st Year Chapter 11 Reaction Kinetics Questions Bank
MCQs
Please select the right answer.
Short Questions
1. 50% of a hypothetical first order reaction completes in one hour. The remaining 50% needs more than one hour to convert itself into products?
2. A finally divided catalyst may prove to be more effective. Give reasons?
3. A particular catalyst is suitable for a particular chemical reaction. Give examples?
4. Activation energy is the minimum amount of energy more than the average energy which is just sufficient is convert reactants into products?
5. Define order of reaction with the help of an example?
6. Differentiate between average and instantaneous rate of reaction?
7. How does a catalyst chemically remain the same at the end of the chemical reaction?
8. How does a catalyst effect the reversible chemical reactions and their energy of activation?
9. How does the increase of temperature increases the rate of the chemical reactions?
10. How the energy of activation can be calculated from the Arrhenius plots?
11. How the enzymes act as catalyst?
12. How the half life periods and initial concentrations are related to give the order of reaction?
13. How the half life periods of the chemical reactions are related with the initial concentrations of the reactants for first, second and third order reactions?
14. How the mechanism of a chemical reaction can help to point out the rate determining step?
15. How the rate of reaction is affected by surface area?
16. How the reactions of fractional order can be studied by the method of half life periods?
17. How the temperature is related with the rate constant?
18. The order of a reaction is obtained from the rate expression of a reaction and the rate expression is obtained from the experiments?
19. The radioactive decay is always a first order reaction. How?
20. The rate of a chemical reaction is an ever changing parameter under the given conditions. Comment upon the statement?
21. The reaction rate decreases every moment but the rate constant ‘K’ of the reaction is a constant quantity, under the given conditions. Justify it?
22. The reactions happen due t⁰Collisions among the molecules, but all the collisions are not fruitful. Justify it?
23. The sum of the coefficient of a balanced chemical equation is not necessarily important to give the order of reaction. Justify it?
24. The units of “rate constant “of second order reaction reaction is dm³, mol⁻¹, sec⁻¹, but the unit of “rate of reaction” is mol. Dm⁻³ Justify it?
25. What are the controlling factors on the activity of the enzyme?
26. What do you mean by autocatalysis?
27. What is catalytic poisoning? Give two examples of catalytic poisoning.
28. What is order of a reaction? When the reactions become zero order?
29. What is promoter or activator?
30. What is temperature coefficient of a reaction?
31. What is the effect of light on the rate of reaction?
32. What is the effect of temperature on the activation energy of a reaction?
33. What type of information is obtained for the order of reaction from half life period of that reaction?
34. Why the reactions having lower energies of activation have faster rates?
Long Questions
1. How will you find the order of reaction by half-life method?
2. How Arrhenius equation explains the effect of temperature on the rate constant of a reaction?
3. What is energy of activation? Discuss collision theory.
4. What is enzyme catalysis? Give an example & give four characteristics of enzyme catalysis.
5. What is catalysis? Write down its types and explain any one of them.
6. Explain Half-life method for the Determination of order of Reaction.
7. Give four characteristics of enzyme catalysis.
8. Write a note on (i) Homogeneous catalysis (ii) Heterogeneous catalysis
9. Write a detailed note on determination of rate of reaction by chemical method.
10. How does Arrhenius equation help us to calculate the energy of activation of a reaction?
11. What is catalyst? Write its three characteristics.
12. A catalyst is required in small amount. Why?
13. What are pseudo first order reactions? Give example.
14. Some reaction taking place around room temperature have activation energies around 50 kJ mol⁻¹. What is the value of the factor at 25°C, 35°C and 45°C?
15. How arrhenius equation explains the effect of temperature on the rate constant of a reaction?
16. In the reaction of NO and H₂, it was observed that equimolecular mixture of gases at 340.5 mm pressure was half changed in 102 seconds. In another experiment with an initial pressure of 288 mm of Hg, the reaction was half completed in 140 seconds. Calculate the order of reaction.
17. How will you find the order of reaction by half life method.
18. Explain second and third order reactions with examples?
19. Define the following terms with examples. (I) Catalyst for a catalyst (ii) Negative catalysis (iii) Autocatalysis
20. How rate of a reaction can be determined? Explain with example