D-And F-Block Elements Ques 162

Question: Iron pipes lying under acidic soil are often attached to blocks of magnesium for protection from rusting. Magnesium offers protection to iron against corrosion because it

[KCET 1998]

Options:

A) Is more readily converted into positive ions

B) Is lighter than iron

C) Forms a corrosion-resistant alloy with iron

D) Prevents air from reaching the surface of iron

Show Answer

Answer:

Correct Answer: A

Solution:

Electric protection: In this Mg acts as anode while iron pipe as cathode. Mg loses electrons prior to iron.



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