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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