What this practice covers
These questions are drawn from past CIE 0620 Chemistry papers and filtered to alloys and their properties. You answer, you find out immediately whether you were right, and you get the reasoning for the correct option and for each distractor. Wrong answers go to a mistakes locker so you can come back to exactly those.
Practice is free. You need an account only so your progress and your mistakes are still there next time.
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What examiners see students get wrong here
These are the errors that cost marks on alloys and their properties, taken from our own topic notes. Read them before you practise and you will recognise the traps in the questions.
- Describing an alloy as a compound, or giving it a chemical formula.
- Saying alloys are harder because the atoms bond more strongly, rather than because the layers cannot slide.
- Saying an alloy does not conduct electricity, when the delocalised electrons are still there.
- Giving brass as copper and tin, which is bronze.
- Saying stainless steel does not rust because it contains nickel, when the chromium oxide layer is the reason.
- Explaining hardness without mentioning that the added atoms are a different size.
- Saying steel is a pure metal, when it is iron alloyed with carbon.
Revise it first
If any of the above is unfamiliar, work through the notes before practising: Alloys and their properties revision notes.