At constant pressure and temperature,the direction of any spontaneous chemical reaction is towards the state where there is a decrease in

For a reaction,$4 M (s) + n O_2 (g) \rightarrow 2 M_2 O_n (s)$,the free energy change is plotted as a function of temperature. The temperature below which the oxide is stable could be inferred from the plot as the point at which :

For the spontaneity of a reaction,which statement is always true?

If $\Delta_r H^{\ominus}$ and $\Delta_r S^{\ominus}$ are standard enthalpy change and standard entropy change respectively for a reaction,the incorrect option is

In which of the following conditions will a reaction always be spontaneous at all temperatures?

$A$ reaction has both $\Delta H$ and $\Delta S$ negative. The rate of reaction