What this practice covers
These questions are drawn from past CIE 9701 Chemistry papers and filtered to states of matter. 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 states of matter, taken from our own topic notes. Read them before you practise and you will recognise the traps in the questions.
- Substituting cm³ or kPa straight into pV = nRT. Convert to m³ and Pa first.
- Using °C in the equation. The temperature must be absolute.
- Saying a gas is ideal at high pressure. It is closest to ideal at low pressure and high temperature.
- Saying covalent bonds break when iodine sublimes. Only the intermolecular forces break.
- Saying ionic solids conduct. They do not, until the ions are free to move.
- Explaining metallic malleability by saying the bonds break. They do not; the delocalised electrons keep the bonding intact as layers slide.
Revise it first
If any of the above is unfamiliar, work through the notes before practising: States of matter revision notes.