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