Question
Question: Several blocks of magnesium are fixed to the bottom of a ship to...
Several blocks of magnesium are fixed to the bottom of a ship to
A
Make the ship lighter
B
Prevent action of water and salt
C
Prevent puncturing by under-sea rocks
D
Keep away the sharks.
Answer
Prevent action of water and salt
Explanation
Solution
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