JEE Main 2019 Chemistry question
Consider the following reduction processes: Zn + 2e → Zn(s); E° = −0.76 V Ca + 2e → Ca(s); E° = −2.87 V Mg + 2e → Mg(s); E° = −2.36 V Ni + 2e → Ni(s); E° = −0.25 V The reducing power of the metals increases in the order:
Answer: (B)
Solution
More negative E° ⇒ stronger reducing metal.