Which of the following options will be correct for the stage of half completion of the reaction AB?

(1) G=0

(2) G>0

(3) G<0

(4) G=-RT ln K

Hint: G=-RT ln K
 
As we know that,
 
G=-RT ln K
 
At the stage of half completion of the reaction,
 
AB, [A]=[B]
 
Therefore, K=1
 
Thus, G=0