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.
