Following are the values of `E_(a)` and `DeltaH` for three reactions carried out at the same temperature `:`
`I :E_(a)=20kJ mol^(-1),DeltaH=-60kJmol^(-1)`
`II :E_(a)=10kJ mol^(-1),DeltaH=-20kJ mol^(-1)`
`III : E_(a)=40 kJ mol^(-1),DeltaH=+15kJ mol^(-1)`
If all the three reaction have same frequency factor then fastest and slowest reaction are `:`

Options

A. `{:("Faster","Slowest"),(I,II):}`
B. `{:("Faster","Slowest"),(II,III):}`
C. `{:("Faster","Slowest"),(I,III):}`
D. can't be predicted

Answer

2

Explanation

The rate of reaction is decided by value of rate constant which depends on energy of activation not on the value of `DeltaH`, definitely the comparison of rate of reaction of backward can be done if `DeltaH` values are also given to us.