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6. what shape does a complex with a coordination number of 6 usually form

  • hexahedral
  • octohedral
  • ditrigonal planar
  • tetrahedral

7. (Fe(H2O)6)^2+ and dropwise ammonia is a ...reaction

  • deprotonation
  • protonation
  • reduction
  • oxidation

8. What are the side effects of using cisplatin as a cancer treatment

  • damage to hair cells,neutrophils and sometimes kidneys
  • damage to hair cells and red blood cells
  • damage to red blood cells only
  • damage to neutrophils and skin cells

9. (Cu(H2O)6)^2+ and excess ammonia forms...

  • (Cu(NH3)4(H2O)2)^2+
  • no reaction
  • (Cu(NH3)6)^2+
  • (Cu(OH)2(H2O)4)

10. what happens when excess ammonia is added to (Fe(H2O)3(OH)3)

  • no visible change
  • fizzing
  • precipitate dissolves
  • colour change brown to green

11. what ion is used in haemoglobin

  • Co^2+
  • Fe^2+
  • Ca^2+
  • Fe^3+

12. what can EDTA^4- be used for

  • treatment for heavy metal poisoning
  • treatment for cancer
  • removal of poisons from catalysts
  • nothing- it is completely useless waste of space

13. what property of transition metals allow them to be good catalysts

  • variable oxidation states
  • form complexes
  • very reactive
  • strong metals

14. what is teh colour change when (Co(NH3)6)^2+ is oxidised to (Co(NH3)6)^3+

  • yellow to pink
  • yellow to brown
  • blue to pink
  • blue to brown

15. what is the definitoin of a transition metal

  • an element that changes between metal and non-metal
  • a metal with no electrons in d-orbital
  • a metal that has at least 1 ion with an incomplete d-orbital
  • a metal within the middle section fo the periodic table

16. which of the following is not a property of transition metals

  • highly stable, inert elements
  • forms coloured complexes
  • variable oxidation states
  • good catalysts

17. why are complexes with multidentate ligands more stable than those with unidentate ligands

  • chelate effect
  • stability effect
  • shielding effect
  • ligand effect

18. what colour is formed when excess ammonia is added to aqueous Co^2+ ions

  • green/blue
  • straw colour
  • dark blue
  • pink

19. how many dative/coordinate onds can form between a molecule of EDTA^4- and a transition metal ion

  • 2
  • 1
  • 6
  • 4

20. why is a support medium used for heterogenous catalysts

  • the catalysts are very expensive and the surface area is increased
  • to stop the catalyst getting lost within the products
  • the catalyst needs to react with the support medium before it functions properly
  • the support medium reacts with any impurities to remove them from the system