The correct statement regarding the free energy change $(\Delta G)$ and the standard free energy change $\left(\Delta G^0\right)$ for (i) melting of ice and (ii) a chemical reaction $\mathbf{P} \rightarrow \mathbf{Q}$ is

• A

  The process of slow melting of ice at $0^{\circ} \mathrm{C}$ and atmospheric pressure is associated with a negative value of $\Delta G$.
• B

  The process of slow melting of ice at $0^{\circ} \mathrm{C}$ at atmospheric pressure is associated with a positive value of $\Delta G$.
• C

  The reaction $\mathbf{P} \rightarrow \mathbf{Q}$ with a positive value of $\Delta G^0$ can never be spontaneous.
• Correct answer
  D

  The reaction $\mathbf{P} \rightarrow \mathbf{Q}$ with a positive value of $\Delta G^0$ can be spontaneous, but the reaction will reach equilibrium with $[\mathbf{Q}]_{e q} \lt [\mathbf{P}]_{e q}$.

Hence, the correct answer is option: 'D'.