Chemistry · Oct / Nov 2021 · Paper 12 · Question 33

Which statements about the corrosion of iron are correct? 1 Corrosion can be prevented by coating the iron with zinc. 2 Corrosion only occurs in the presence of both air and water. 3 Rust is an alloy of iron and oxygen. 4 Sacrificial protection occurs when iron is connected to a less reactive metal.

1. A1 and 2
2. B1 and 3
3. C2 and 4
4. D3 and 4

As printed in the paper