Which of these metals is/are often used to help prevent the rusting of iron?
I. Al
II. Zn
III. Mg
IV. Na
A) I only
B) II only
C) I and III
D) I, II, and IV
E) I, II, and III

Question

Quizplus · Accepted Answer

Aluminum (Al), Zinc (Zn), and Magnesium (Mg) are metals often used in galvanic protection methods to prevent the rusting of iron by acting as sacrificial anodes. Sodium (Na) is not typically used for this purpose due to its high reactivity and inability to form a protective layer.

Which of These Metals Is/are Often Used to Help Prevent