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6. When MORE OH- is added to a Zinc with OH- solution is added, what is observed?
- White ppt dissolves to form a colourless solution
- Colourless ppt dissolves to form a white solution
- No change from a white ppt
- No change from a colourless ppt
7. Which two transition metal (ions) produce white precipitates in reactions both with OH- and NH3? (not in excess)
- Manganate and Zinc
- Nickel and Zinc
- Mangante and Copper (II)
- Zinc and Iron (III)
8. Reaction of Copper (II) with excess Ammonia produces a...
- Blue precipitate
- Green precipitate
- Deep blue solution
- Green solution
9. What is observed when Iron (II) reacts with sodium hydroxide or NH3?
- Green precipitate
- Green precipitate which redissolves to form a green solution
- Brown precipitate
- Blue precipitate
10. What colour is the Cr3+ ion in water?
- Blue precipitate
- Violet solution
- Blue solution
- Violet precipitate
11. Reaction of Iron (III) with ammonia produces a...
- Blue solution
- Yellow precipitate
- Brown precipitate
- Green precipiate
12. Only Zinc and Chronium react to produce a different colour with excess OH- added.