The oxide and the chloride of an element $X$ are each mixed separately with water. The two solutions formed have the same action on litmus. What might element $X$ be?
- A$\text{Al}$
- B$\text{Ca}$
- C$\text{Na}$
- D$\text{P}$
Chemistry 9701 · AS & A Level · The Periodic Table: chemical periodicity