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Identify the correct statement:

1.	The corrosion of iron can be minimised by forming contact with another metal with a higher reduction potential.
2.	Iron corrodes in oxygen-free water
3.	The corrosion of iron can be minimised by forming an impermeable barrier
4.	Iron corrodes more rapidly in salt water because its electrochemical potential is higher.

Subtopic: Corrosion |

Level 3: 35%-60%

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