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6. The two conditions/elements needed for rust are what?

  • Water and carbon dioxide
  • Water and oxygen
  • Oxygen and carbon dioxide
  • Oxygen and copper

7. Why is cryolite added in the extraction of aluminium?

  • It speeds up the reaciton
  • It looks pretty
  • It lowers the melting point
  • It raises the melting point

8. What is the general formula for alkanes?

  • CnH2n+2
  • CnH2n
  • CnH2n-2
  • CnHn+2

9. Metals that are more reactive than carbon are extracted in what way?

  • Electrolysis
  • Titrations
  • The Blast Furnace
  • Burning

10. Concentration=???

  • Moles/volume
  • volume x Mr
  • Volume/moles
  • moles x volume

11. In the excess solid method, you need what type of base and an acid?

  • Hot
  • Reactive
  • Insoluble
  • Soluble

12. In group 1, how does the reactivity change as you go down the group?

  • It doubles
  • It increases
  • It decreases
  • It stays the same

13. Phenolphthalein is what colour in acids?

  • White
  • Colourless
  • Pink
  • Blue

14. Isotopes have a different number of what?

  • Electron shells
  • Neutrons
  • Electrons
  • Protons

15. When adding sodium hydroxide solution, Copper forms a what colour precipitate?

  • Sludgy green
  • Brown
  • Blue
  • Purple

16. The relative mass of an electron is what?

  • 1/2000
  • 1
  • 1/1000
  • 1/4

17. In a flame test, Lithium burns with which colour flame?

  • Red
  • Purple
  • Blue
  • Brick red

18. Which structure conducts electricity when molten or dissolved?

  • Giant ionic
  • Simple covalent
  • Giant covalent
  • Giant metallic