The correct option is B 2,1,0,3
Here we can identify the order of the reaction from the unit of the rate constants given.
We know, unit of rate constant =[1unit of concentration]n−1×time−1
=[litremol](n−1)×sec−1
Where, n = order of the reaction
(a) k=7.06×10−3 mol−1 L s−1
So here, n=2 and hence it is a second order reaction.
(b) k=5.60×10−5 s−1
So here, n=1 and hence it is a first order reaction.
(c) k=1.25×10−2 mol L−1 s−1
So here, n=0 and hence it is a zero order reaction.
(d) k=1.25×10−2 mol−2 L2 s−1
So here, n=3 and hence it is a third order reaction.