The correct relationship between free energy change in a reaction and the corresponding equilibrium constant $\mathrm{K}_{\mathrm{c}}$ is

• A

  $-\Delta \mathrm{G}=\mathrm{RT} \ln \mathrm{K}_{\mathrm{c}}$
• B

  $\Delta \mathrm{G}^0=\mathrm{RT} \ln \mathrm{K}_{\mathrm{c}}$
• Correct answer
  C

  $-\Delta \mathrm{G}^0=\mathrm{RT}$ In $\mathrm{K}_{\mathrm{c}}$
• D

  $\Delta \mathrm{G}=\mathrm{RT} \ln \mathrm{K}_{\mathrm{c}}$

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