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(D) The most convenient method to protect the bottom of a ship made of iron is by connecting it with a more reactive metal block,such as $Mg$ (magnesi

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Connecting with $Mg$ block

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(D) The most convenient method to protect the bottom of a ship made of iron is by connecting it with a more reactive metal block,such as $Mg$ (magnesium). This is known as cathodic protection or sacrificial protection. Since $Mg$ is more reactive than $Fe$ (iron),it acts as the anode and undergoes oxidation,while the iron acts as the cathode and is protected from corrosion.

The most convenient method to protect the bottom of a ship made of iron is

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