BITSAT2017ChemistryElectrochemistryActual
Blocks of magnesium are fixed to the bottom of a ship to
Options
- Ablock hole in the ship
- Bacidity of sea water
- Cmake the ship lighter
- Dprevent the action of water and salt
Correct answer
D. prevent the action of water and salt
Step-by-step solution
Block of magnesium prevents the action of water and salt of iron (of ship) by sacrificing itself. This is method of protection of ship (i.e. of iron), known as sacrificial protection. It prevents corrosive action of water and salt by providing cathodic protection.