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In some cases, it is found that a large ...

In some cases, it is found that a large number of colliding molecules have energy more than thereshold value, yet the reaction is slow. Why?

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The reactant molecules may not be properly oriented at the time of collisions.
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(a) The decomposition of A into products has a value of K as 4.5 xx 10^(3)s^(-1) " at "10^(@)C and energy of activation 60kJ "mol"^(-1) . At what temperature would K be 1.5 xx 10^(4) s^(-1) ? (b) (i) If half life period of a first order reaction is x and 3//4^(th) life period of the same reaction is y, how are x and y related to each other ? (ii) In some cases it is found that a large number of colliding molecules have energy more than threshold energy, yet the reaction is slow. Why?

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DINESH PUBLICATION-CHEMICAL KINETICS-Qestions from board examinations
  1. With the help of an example explain what is meant by pseudo first or...

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  2. What is the elementary reactions?

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  3. In some cases, it is found that a large number of colliding molecules ...

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  4. Express the relation between the half-life period of a reaction and in...

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  5. Express the relatin between the half-life period of a reaction and ini...

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  6. For a reaction A + 2B to C, rate =k[A]^(x)[B]^(y). What is the order o...

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  7. What are the units of rate constant for zero order reactions?

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  8. For the reaction : Ester + H^(+) to Acid + Alcohol, rate = k[A]^(1//2)...

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  9. For a reaction, A+Brarr Product, the rate law is given by r=k[A]^((1)/...

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  10. The conversion of molecules X to Y follows second order kinetics. If t...

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  11. A substance with initial concentration 'a' follows zero order kinetics...

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  12. How does the value of rate constant vary with reactant concentrations...

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  13. The reaction A+B to C. has zero order. What is the rate equation?

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  14. For a reaction AtoB, the rate of reaction becomes twenty seven times w...

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  15. A reaction is 50 % complete in 2 hours and 75 % complete in 4 hours th...

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  16. What is meant by elementary step in a reaction?

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  17. What is the order of reaction whose rate constant has the same units a...

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  18. A first order reaction is 50% complete in 20 minutes. What is its rate...

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  19. Why in general a reaction does not proceed with a uniform rate through...

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  20. Define activation energy for a reaction.

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