The newest 9 of 9 written questions. Open one to see it on the real paper.
Iron rusts when exposed to water and a gaseous element. Name this element.
See it on the paper →State the formulae for the two substances that are needed to cause iron to rust. and
See it on the paper →State the formulae for the two substances that are needed to cause iron to rust. and
See it on the paper →Name the element and the compound that react with iron to make rust. element compound
See it on the paper →Recycling iron costs less than extracting iron from iron ore. Suggest one other reason why iron needs to be recycled.
See it on the paper →State the two substances that react with iron to make rust.
See it on the paper →State the two conditions needed for the rusting of iron.
See it on the paper →Name the element and the compound that react with iron when it rusts. element compound
See it on the paper →State the name of the other substance that must be present for iron to rust.
See it on the paper →Most candidates knew that oxygen and water are the two substances that react with iron to make rust. Air was not accepted as an answer.
— Examiner report, February/March 2023, 0654/32 Q11(d) (Cambridge)
The presence of both oxygen and water were well known as the two conditions needed for the rusting of iron.
— Examiner report, February/March 2022, 0654/32 Q5(c)(iii) (Cambridge)
Water was often identified as the other substance that needed to be present for iron to rust.
— Examiner report, October/November 2020, 0654/33 Q2(e)(i) (Cambridge)
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