The decreasing order of enthalpies of reaction for producing carbocation is:

Options

A. `DeltaH_(1)^(@)gtDeltaH_(2)^(@)gtDeltaH_(3)^(@)gtDeltaH_(4)^(@)`
B. `DeltaH_(4)^(@)gtDeltaH_(1)^(@)gtDeltaH_(2)^(@)gtDeltaH_(3)^(@)`
C. `DeltaH_(3)^(@)gtDeltaH_(2)^(@)gtDeltaH_(1)^(@)gtDeltaH_(4)^(@)`
D. `DeltaH_(2)^(@)gtDeltaH_(1)^(@)gtDeltaH_(4)^(@)gtDeltaH_(3)^(@)`

Answer

B

Explanation

`R-ClrarrR^(+)+Cl^(Theta)DeltaH_(0)`
Bond Energy of carbon halogen bond `prop(1)/("Stability of carbocation")`