6. What happens when sodium hydroxide is added to Iron(III)?
- A reddish-brown precipitate forms
- It dissolves
- A white precipitate forms
- A blue precipitate forms
- A green precipitate forms that slowly turns brown
7. What happens to aluminium hydroxide when sodium hydroxide is added?
- It dissolves
- A reddish-brown precipitate forms
- A white precipitate forms
- A blue precipitate forms
- A green precipitate forms that slowly turns brown
8. What is the test for negative carbonate ions?
- add dilute hydrochloric acid and then barium chloride solution
- add a little aluminium powder and sodium hydroxide
- add dilute hydrochloric acid.
- add dilute nitric acid and silver nitrate solution.
9. What is the test for Halide ions?
- add dilute hydrochloric acid.
- add dilute nitric acid and silver nitrate solution.
- add dilute hydrochloric acid and then barium chloride solution
- add a little aluminium powder and sodium hydroxide
10. What is the test for sulfate ions?
- add dilute nitric acid and silver nitrate solution.
- add dilute hydrochloric acid and then barium chloride solution
- add a little aluminium powder and sodium hydroxide
- add dilute hydrochloric acid.
11. What is the test for nitrate ions?
- add dilute nitric acid and silver nitrate solution.
- add dilute hydrochloric acid.
- add a little aluminium powder and sodium hydroxide
- add dilute hydrochloric acid and then barium chloride solution
12. What do carbonates produce when they decompose on heating?
- carbon dioxide
- copper oxide
13. What colour is copper carbonate?
- blue
- yellow
- green
- white
- black
14. What colour is zinc carbonate?
- white
- green
- black
- blue
- yellow
15. What colour is copper oxide?
- yellow
- white
- black
- green
- blue
16. What colour is zinc oxide when hot?
- blue
- white
- yellow
- green
- black
17. What colour is zinc oxide when cool?
- blue
- yellow
- black
- white
- green
18. What do all organic compounds contain?
- potassium
- calcium
- carbon
- magnesium
19. What do many organic substances produce when burnt in air?
- carbon dioxide
- copper oxide
20. Those that do not burn easily contain..............
- carbon
- copper