# For spontaneous reaction $\Delta G$ is

$(a)\;\text{Positive} \\(b)\;\text {Negative} \\(c)\;\text{Zero} \\(d)\;\text{Can not be predicted}$

For spontaneous reaction $\Delta G$ is negative
The sign of ΔG will change from positive to negative (or vice versa) where T = ΔH/ΔS. In cases where ΔG is: negative, the process is spontaneous and may proceed in the forward direction
Hence b is the correct answer
edited Feb 20