Test

Testing for ions

Daisy Fletcher-Cooney 10 preguntas

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Preguntas del test (10)

1What group are the alkali metals in?
1. AGroup 1
2. BGroup 7
3. CGroup 3
4. DGroup 4
2What colour flame does lithium produce?
1. AOrange
2. BYellow
3. CLilac
4. DRed
3Sodium produces an orange flame
1. AVerdadero
2. BFalso
4What colour does potassium produce?
1. ABlue
2. BLilac
3. CRed
4. DYellow
5. EGreen
5What colour flame does calcium produce?
1. ABrick red
2. Blilac
3. Cred
4. Dorange
6Ammonium ions can be identified in a solution by adding dilute sodium hydroxide solution and gently heating. If ammonium ions are present, they will be converted to ammonia gas. Ammonia has a characteristic choking smell. It also turns damp red litmus paper or damp universal indicator paper blue.
1. AVerdadero
2. BFalso
7When NaOH is added to Fe2+, what colour is the precipitate?
1. AOrange-brown
2. Bgreen
3. Cblue
8When NaOH is added to Fe3+, what colour is the precipitate?
1. AGreen
2. BOrange-brown
3. CBlue
9When NaOH is added to Cu2+, the precipitate is green
1. AVerdadero
2. BFalso
10When dilute NaOH is added to Zn2+, a white precipitate forms
1. AVerdadero
2. BFalso