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21. What is the usefulness of initial rate constant?

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22. The reaction: A + 2B → C + D, obeys the rate of reaction: Rate = k[ A]^x. [B]^y. What should be the order of this reaction ?

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23. What will be the order of reaction if the rate of reaction is independent of all the concentrations of all the rectants?

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24. What will be the order of reaction if the plot of log c verses time is a straight line with a negative slope?

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25. How does the rate of a reaction change with the change of temperature?

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26. Express the rate of reaction:
N₂(g) + 3H₂(g) → 2NH₃(g)
with respect to formation of ammonia gas?

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The rate of reaction is express only by [A][B] i.e.

\frac{dx}{dt} = k [A] [B] .

Thus no effect is occur when the concentration of c is doubled.

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28. Determine the order of the reaction, which has the rate expression: Rate = k[A]^1/2[B]¹.

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29. Write the rate expression for the reaction: a A → Product.

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30. How is half-life of a first order reaction related to the concentration of the reactant?

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