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6. Turns orange in flame
- Calcium
- Lithium
- Sodium
- Potassium
7. Squeaky pop when lit in air and reacts with oxygen to make water
- Oxygen
- Chlorine
- Hydrogen
- Carbon dioxide
8. Glowing splint reignites in gas sample
- Chlorine
- Oxygen
- Hydrogen
- Carbon dioxide
9. Sodium nitrate makes very pale cream precipitate
- Bromide
- Iodide
- Chloride
- Fluoride
10. Sodium nitrate makes white precipitate
- Chloride
- Bromide
- Fluoride
- Iodide
11. Turns lilac in flame
- Calcium
- Potassium
- Lithium
- Copper
12. Blue litmus paper to red then bleaches white. Makes damp starch iodide paper turn blue black.
- Oxygen
- Hydrogen
- Chlorine
- Carbon dioxide