the half life period of certain reaction is directly proportional to initial concentration of the reactant.predict the order of the reaction and

Question

it was asked in exam and i was not able to answer it

Answer 1

This question is confusing since it is asking about the order of a reaction and it starts with a half life introduction.

 

So dealing with only the order of the reaction the answer is :

it is a first order reaction

in a first order reaction the rate of the reaction (for this question half-life) is directly dependent on the concentration of the reactant under investigation

to put it plainly the rate is dependent on the concentration

and since the half-life (rate) is directly proportional to the concentration it is a first order reaction.