While cooking some Kwiknoodles in a saucepan over a gas flame, a student noticed some water boil over. This caused the flame to turn yellow in colour.

Sodium was present in the cooking water that boiled over

Potassium was present in the cooking water that boiled over

Calcium was present in the cooking water that boiled over

Copper was present in the cooking water that boiled over

The flame colours of three compounds are: NaCl: Yellow CaCl2: brick-red KCl: lilac A sample of a chalk was inserted into a bunse burner flame. Three students made the following observations: 1) The flame was reddish 2) The flame was brownish-red and then became blue again 3) The flame was full red when the wire was inserted Which compound made a considerate portion of the chalk

Potassium Chloride and Sodium Chloride

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1While cooking some Kwiknoodles in a saucepan over a gas flame, a student noticed some water boil over. This caused the flame to turn yellow in colour.
1. ASodium was present in the cooking water that boiled over
2. BPotassium was present in the cooking water that boiled over
3. CCalcium was present in the cooking water that boiled over
4. DCopper was present in the cooking water that boiled over
2The flame colours of three compounds are:
NaCl: Yellow
CaCl2: brick-red
KCl: lilac

A sample of a chalk was inserted into a bunse burner flame. Three students made the following observations:
1) The flame was reddish
2) The flame was brownish-red and then became blue again
3) The flame was full red when the wire was inserted
Which compound made a considerate portion of the chalk
1. AChlorine
2. BCalcium Chloride
3. CCalcium
4. DPotassium Chloride and Sodium Chloride

Descripción: Chemistry Test sobre Prep Physics 2008 - Chemistry, creado por maddie.rapisardi el 30/08/2013.
Autor: maddie.rapisardi
Idioma: English
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Etiquetas: chemistry
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