Chemical kinetics deals with rate of reaction, factors influencing rate,rate constant and factors influencing rate constant of a reaction. False statement among the following is
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a
As temperature increases, number of activated molecules increases.
b
K=PZe−EaRT, ‘P’ is steric factor (or) orientation factor.
c
Rate constant of an exothermic reaction decreases with increase in temperature.
d
Rate of a first order reaction decreases with increase in time.
answer is C.
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Detailed Solution
As temperature ↑, number of activated molecules ↑ rate increases. P= steric factor; Z= collision frequency; A=PZ; K=A e-EaRT;Rate constant always increases with increase in temperature irrespective whether the reaction is exothermic or endothermic.For all non-zero order reactions rate of reaction decreases with time