Which of the following options will be correct for the stage of half completion of the reaction : `AhArrB` ?

Options

A. `DeltaG^(@)=0`
B. `DeltaG^(@)gt0`
C. `DeltaG^(@)lt0`
D. `DeltaG^(@)=-RTln2`

Answer

A

Explanation

When the reaction is half completed, `[A]=[B]`
Thus, `K=([B])/([A])=1`
`:." "DeltaG^(@)=-RTlnK=-Rtln(1)=0`