Corrosion — task. Chemistry CBSE Live product, Class 10 (2026-27).

Select the right option to answer the question:

An old ship docked at a harbor with large patches of reddish-brown corrosion visible on its hull, deck, and railings.

Corrosion

i. Which of the following methods can help prevent corrosion of such ships?

Leaving the metal exposed to air to harden naturally
Applying protective coatings like paint, varnish, or galvanisation
Using pure iron instead of steel, since it corrodes more slowly
Storing the ship in freshwater without any protective layer

ii. Write the balanced chemical equation.

\(Fe + O_2 → 2Fe_2O_4 xH_2O\)
\(Fe + 2O_2 + xH_2O → Fe_2O_3\)
\(4Fe + 3O_2 + xH_2O → 2Fe_2O_3 xH_2O\)
\(2Fe + 3O_2 → 2FeO xH_2O\)

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