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

1. Coating it with red lead oxide
2. White tin plating
3. Connecting it with Mg block
4. Connecting it with Pb block

Correct answer: Connecting it with Mg block

Solution

Connecting the iron ship to a magnesium block is a form of cathodic protection. Magnesium, being more reactive, acts as a sacrificial anode and prevents the iron from corroding.

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