Which, If Any, of the Following Metals Would Not Be $\degree$

question 18

Multiple Choice

Which, if any, of the following metals would not be capable of acting as a sacrificial anode when used with iron E $\degree$ _Fe = -0.44 V; all E $\degree$ values refer to the M²⁺/M half-cell reactions.

• A) manganese, Mn, E\(\degree\)= -1.18 V
• B) cadmium, Cd, E\(\degree\) = -0.40 V
• C) magnesium, Mg, E\(\degree\) = -2.37 V
• D) zinc, Zn, E\(\degree\) = -0.76 V
• E) All of these metals are capable of acting as sacrificial anodes with iron.

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