Iron pipes lying under acidic soil are often attached to blocks of mag – McqOptions

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1.	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 [DPMT 2004; BHU 2004]
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» C. Is higher than iron

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