Several blocks of magnesium are fixed to the bottom of a ship to (a) keep away the sharks
Several blocks of magnesium are fixed to the bottom of a ship to
(a) keep away the sharks
(b) make the ship lighter
(c) prevent action of water and salt
(d) prevent puncturing by undersea rocks.
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Correct option(c) prevent action of water and salt
Explanation:
Magnesium usually have a thin layer of MgO over its surface which prevents the underneath of metal from reacting with moisture. Thus, several blocks of magnesium are fixed to the bottom of a ship to prevent action of water and salt.
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