According to Arrhenius hypothesis, rate of reaction increases with increase in temperature. Give reasons.

According to Arrhenius hypothesis, when temperature of the reaction is increased the activation energy of reactant molecules increases, thereby increasing the rate of the reactions.
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What is the usefulness of Initial Rate Method?

The usefulness of initial rate method is that we can determine the order of a reaction if a reaction involves more than one reactant.
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How is the value of rate constant (k) depends on concentration of reactants and temperature?

The value k does not depend on the concentration of reactant. It only depend on the temperature.
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What will be the shape of the curve if concentration of the reactant is plotted against time for a zero order reaction?

For a zero order reaction, it gives a straight line parallel to time ordinate.
 
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Name one method which can be used to study fast reactions experimentally.


Spectrophotometric technique.
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