6. When added sodium hydroxide, white precipitation will form
- All of above
- Al3+
- Ca2+
- Mg2+
7. Flame colour: yellow
- Na+
- Li+
- Ca2+
- Ba2+
8. Flame colour: Lilac
- Ba2+
- Li+
- K+
- Ca+
9. When excessive NaOH is added, the precipitates dissolves
- K+
- Al3+
- Ca2+
- Mg2+
10. When Sodium hydroxide is added to solution of positive ions, what forms?
- A precipitate of the metal hydroxide forms
- It will turn milky
- A red flame will appear
- A lilac flame will appear
11. No colour in flame test
- Ba2+
- Li+
- Mg2+
- K+
12. When added OH-, it is green in colour
- Al3+
- Ba2+
- Fe2+
- Fe3+
