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6. What is the colour change when [Fe(H2O)6] 2+ becomes [Fe(H2O)4(OH)2] ?
- Brown solution to brown-yellow precipitate
- Green solution to brown solution
- Pale green solution to green precipitate
- Blue solution to pale blue precipitate
7. What colour is the Chromate(VI) ion in solution ( CrO4 2- )?
8. What colour is [Co(Cl)4]2- ?
- Yellow solution
- Blue solution
- Pink solution
- Green solution
9. What colour is VO2 + ?
10. What colour is [Cu(Cl)4]2- ?
- Dark blue solution
- Yellow solution
- Brown precipitate
- Dark green solution
11. What colour is [Cr(H2O)6] 3+ ?
- Brown precipitate
- Violet or green solution
- Yellow solution
- Orange solution
12. What colour is Vanadium(III) ?
13. What colour is [Co(H2O)6]2+ ?
- Blue precipitate
- Pale blue solution
- Pink solution
- Brown solution
15. What colour is VO 2+ ?
16. What colour is [Cu(H2O)6]2+ ?
- Pink solution
- Blue solution
- Blue precipitate
- Yellow solution
17. What colour is [Cu(NH3)4(H2O)2]2+ ?
- Dark blue solution
- Light blue precipitate
- Pale blue solution
- Pink solution
18. What colour is vanadium in its lowest oxidation state, 2+ ?
19. What colour is [Cr(OH)6]3- ?
- Green solution
- Yellow solution
- Green precipitate
- Orange solution
20. What colour is Cr2+?
- Orange solution
- Green solution
- Blue solution
- Violet solution