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
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a
Prevents air from reaching the surface of iron
b
is more readily converted into positive ions
c
is higher than iron
d
Forms a corrosion-resistance alloy with iron
answer is B.
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Detailed Solution
Due to electropositive and reactive in nature, magnesium is readily converted into positive ions on contact with iron pipes and, hence, iron pipes remains as it is.
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