Corrosion
9 past-paper questions on Corrosion · examined 2018–2023.
20237 questions
Which gas in the air is needed for corrosion to occur? (1) A argon B carbon dioxide C nitrogen D oxygen
What type of reaction happens when the iron in steel corrodes? (1) A the iron has been displaced B the iron has been neutralised C the iron has been oxidised D the iron has been reduced
Rust can be removed from steel by treating it with dilute hydrochloric acid. One product formed in this reaction is iron chloride, FeCl3. Calculate the relative formula mass of this iron chloride. (relative atomic masses: Fe = 56.0, Cl = 35.5)
Using Figure 6, state which non-metal is in both types of steel.
Using Figure 6, state which metal is added to steel to increase its resistance to corrosion.
Explain one other way that corrosion of steel can be prevented.
A student is given two nails of the same size but made of different types of steel. They are also given two boiling tubes and some distilled water. Devise an experiment to show which nail corrodes more quickly.
20181 question
Painting iron objects prevents corrosion. Explain why painting iron objects prevents corrosion.
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