Q. 34.4( 5 Votes )

For a reaction, h

Answer :

First order reaction


The half-life of a reaction is the time in which the concentration of a reactant is reduced to half of its initial concentration. It is represented as t1/2.


We know that, for a first-order reaction,



k = rate constant of first order reaction


t = time


R’ = initial concentration of reactant


R = concentration of reactant


Now at half life, R = R’/2 ( according to above definition )





( log2 = 0.301)



hence, its independent of concentration.


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