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6. Transition elements first lose electrons from?

  • 4s sub-shell
  • 2p sub-shell
  • 3d sub-shell
  • 3p sub-shell

7. Which list best suits the properties of transition elements?

  • matte, high densities, varying oxidation states, high melting point, high boiling point.
  • variable oxidation states, shiny, high densities, high boiling point, non-metal
  • Shiny, high densities, high melting points, high boiling points.
  • Shiny, low densities, high boiling point, low melting point.

8. How many different oxidation states does Manganese have?

  • 8
  • 7
  • 9
  • 5
  • 6

9. The highest oxidation state of a transition element is often found in a strong oxidising agent?

  • True
  • False

10. Transition elements are known for their catalytic properties, which reactions below are catalysed by transition elements?

  • Haber Process, Contact Process, Hydrogenation Process.
  • Haber process and Azo Dyes
  • Reduction of Ketones/Aldehydes

11. Precipitation - what colour change would you observe when NaOH is added to Fe +2 ions?

  • pale green to brown precipitate
  • pale green solution which forms a green precipitate turning rusty brown on surface when standing in air
  • green to green precipitate
  • pale green to green precipitate

12. Cobalt +2 ions are what colour

  • lilac
  • orange
  • pink
  • hot pink

13. When cobalt +2 ions react with NaOH, what is the result?

  • pale yellow precipitate
  • creamy yellow precipitate
  • A blue precipitate which turns beige in presence of air
  • beige precipitate