What this practice covers
These questions are drawn from past CIE 0620 Chemistry papers and filtered to group i 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 group i properties, taken from our own topic notes. Read them before you practise and you will recognise the traps in the questions.
- Saying the reaction with water gives an acid, when it gives an alkali.
- Forgetting hydrogen as a product, and writing only the hydroxide.
- Explaining increasing reactivity by "more electrons" rather than by the outer electron being further from the nucleus and shielded.
- Saying the metals are stored under oil to stop them melting, rather than to keep out air and water.
- Giving potassium's flame as orange and sodium's as lilac, which is the wrong way round.
- Saying all alkali metals melt during the reaction, when lithium does not.
- Predicting that rubidium floats, when its density is above that of water.
Revise it first
If any of the above is unfamiliar, work through the notes before practising: Group I properties revision notes.