7. When NaOH is added to a metal sulphate, what forms a white pecipitate which then redissolves with excess NaOH?
Calcium
Aluminium
Magnesium
8. When NaOH is added to Iron(II) and Iron (III) ions, one forms a green precipitate and one forms an orange pecipitate. Which forms the green precipitate?
Iron (II) (ferrous)
Iron (III) (ferric)
9. When hydrochloric acid then barium chloride is added to a sample a white precipitate forms, what was the non-metal ion present in the sample?
Sulphate
Carbonate
Nitrate
10. When heated Copper Carbonate (CuCO3):
starts grey and goes white
starts green and goes black
starts white, glows yellow then goes back to being white
11. Natural fibres:
Produce a smell when heated
Char when heated
Melt when heated
12. Carbon Dioxide turns limewater cloudy?
True
False
13. A liquid is added to anhydrous copper sulphate (a white powder) and it turns the powder blue. This liquid is:
Nitric Acid
Water
Sodium Hydroxide
14. A burning splint is put into a test tube of unknown gas. The splint goes out with a squeaky pop, the gas is:
Ammonia
Oxygen
Hydrogen
Carbon Dioxide
15. Potassium ions go what colour in a flame test?
Green
Lilac
Red
Orange
Yellow
16. In a flame test, which metal ion goes a faint apple green colour?
