Several blocks of magnesium are fixed to the bottom of a sh…

Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Alkaline Earth Metals Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 13, 2026

Several blocks of magnesium are fixed to the bottom of a ship to :

make the ship lighter

prevent action of water and salt

prevent puncturing by under-sea rocks

keep away the sharks.

Text Solution

Verified by Experts

The correct answer is:

It gives cathodic protection or sacrificial protection, as Mg is more reactive than steel. Hence it prevent action of water and salt on steel body.

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