Free energy changes for two reaction mechanism 'X' and 'Y are respectively - 15 and - 5 units. It implies that X is

Answer: Option B

As, we know the relation $$\Delta G=\Delta G^{\circ }+RTlnQ$$      where $$Q=$$  reaction quotient, higher the value of gibbs free energy change $$\Rightarrow$$ higher is the value of $$Q\Rightarrow$$ faster is the rate of the reaction.