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1st Year Chemistry Short Questions (Chapter 11)

 If you are in 1st year class


And searching for important short questions for your exams preparation than read it out 


Here is some short questions from chapter 11 of 1st year


INTRODUCTION 


1. Give examples of slow, moderate and fast reactions. 


2. Define chemical kinetics. 


3. What is rate determining step


RATE OF REACTION 


4. What is meant by rate of reaction? Describe graphically 


5. What happens to the rate of chemical reaction with the passage of time? 


6. The rate of reaction is ever changing parameter. Comment


7. The reaction rate decreases every moment, but the rate constant remains constant. Justify 


8. What is average and instantaneous rate of reaction? Give expression 


9. Describe rate or velocity constant. Write its unit


10. The unit of rate constant for second order reactions are dm3mol ^-1sec^-1 but the unit of rate of reaction is moldm^-3 ?. Justify 


ORDER OF REACTION 


11. What is order of reaction? Classify reactions based on order 


12. What type of information is obtained from the order of reaction? 


13. What is pseudo first order reactions 


14. The radioactive decay is always a first order reaction. How? 


15. When reaction becomes zero order? 


16. The order of reaction may be in fraction. Justify with example 


17. The sum of the coefficient of the balanced chemical equation is not necessarily important to give the order of the reaction.


18. Write names of four methods to find order of reaction 


19. Describe method of large excess to find order of the reaction 


20. Describe half-life method to finding the order of reaction or (How half-life and initial concentrations are related to give order of the reaction) 


HALF LIFE PERIOD 


21. Define half-life period and give its relationship with order of reaction 


22. 50% of the first order hypothetical reaction completes in one hour. The remaining 50% requires more than one hour. Why? 


DETERMINATION OF RATE OF REACTION


 23. Write names of physical method to find rate of reaction 


24. What is optical rotation and dilatometric method to find rate of reaction? 


ENERGY OF ACTIVATION 


25. Define activation energy & activated complex 


26. What is difference b/w effective and non-effective collision (Why some reactions are slow)?


FACTORS EFFECTING RATE OF REACTION 


27. Names the factors which effect the rate of the reaction 


28. How nature of reactant effect rate of reaction? 


29. How surface area & light effects the rate of reaction 


30. Discuss the effect of temperature on the rate of reaction.


31. What is Arrhenius's equation. (How temp. is related to rate constant)


CATALYSIS 


32. What is catalysis & catalyst. Give examples


33. How catalyst effect the rate of reaction? 


34. Differentiate b/w homogeneous and heterogeneous catalysis? 


35. Mention any four characteristics of catalyst 


36. In many cases shining surface of catalyst becomes dull. Why


37. Catalyst required in a trace amount. Justify the statement 


38. A particular catalyst is suitable for particular reaction. Justify the statement (A catalyst is specific in action. Justify the statement) 


39. What is catalytic poisoning. Give two examples 


40. What is meant by the statement “Catalyst for the catalyst"


41. What is negative catalyst. Give example 


ENZYME CATALYSIS


42. What are enzymes? Give two reactions in which they act as catalyst? 


43. Give hydrolysis reactions of urea & glucose. 


44. Describe the characteristics of enzyme act as catalyst 



REGARDS : TALHA



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