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6. Some metals form a coloured precipitate with NaOH which is another way we can test for metal ions
7. If the colour of the precipitate goes blue, which of these metal ions are present?
- Iron (III)
- Calcium
- Aluminium
- Copper (II)
- Iron (II)
8. If the colour of the precipitate goes reddish brown, which of these metal ions are present?
- Copper (II)
- Iron (II)
- Iron (III)
- Calcium
- Aluminium
9. The test for nitrates produces ammonia
10. Which of these techniques is NOT used to identify elements or compounds?
- Mass Spectrometry
- Infrared Spectrometry
- They all are used
- Gas-liquid Chromatography
- Ultra-violet Spectroscopy