Chemistry · Oct / Nov 2025 · Paper 11 · Question 21

The Group I metals lithium, sodium and potassium show trends in their melting points and in their reactions with water. Which statement is correct going down the group from lithium to potassium?

1. ATheir melting points decrease and their reaction with water becomes less vigorous.
2. BTheir melting points decrease and their reaction with water becomes more vigorous.
3. CTheir melting points increase and their reaction with water becomes less vigorous.
4. DTheir melting points increase and their reaction with water becomes more vigorous.

As printed in the paper