Question

Which statement is true in regard to a spontaneous redox reaction?

• A. $\text{E}_{\text{red}}^{}$ is always negative
• B. $\text{E}_{\text{cell}}^{}$ is always positive
• C. $E_{ox}^{}$ is always positive
• D. $E_{red}^{}$ is always positive

Answer 1

Answer: (B)

$\text{ΔG }\text{=} \, -\text{nFE}_{\text{cell}}^{}$

If $\text{E}_{\text{cell}}^{}$ is +ve, then $\text{ΔG}^{}$ will be -ve showing that cell reaction is spontaneous.