Question

Which of the following factor does not contribute to the rusting of iron?

(a) Presence of acids and electrolytes

(b) Contact with less reactive metal

(c) Presence of water and oxygen

(d) Contact with more reactive metal

The question was posed to me in an interview for internship.

My enquiry is from Wet Theory of Corrosion topic in chapter Corrosion, Electrolysis, Fuel Cells and Batteries of Engineering Chemistry II

Answer 1

Correct choice is (d) Contact with more reactive metal

For explanation: Contact with the more reactive metal does not contribute to the rusting of iron whereas all the other given factors contribute to the rusting of iron.