2690060
Beschreibung
Quiz von lisawinkler10, aktualisiert more than 1 year ago
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Erstellt von lisawinkler10
vor mehr als 9 Jahre
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Frage 1
Frage
Which two are examples of oxidising agents?
Antworten
-
Acidified Potassium Manganate(VII)
-
Aqueous Potassium Iodide
-
Anhydrous Calcium Chloride
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Concentrated Sulphuric Acid
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Acidified Potassium Dichromate(VI)
Frage 2
Frage
What is the colour change for the oxidising agent Acidified Potassium Manganate(VII)?
Antworten
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(purple to colourless)
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(orange to green)
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(green to orange)
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(white to blue)
Frage 3
Frage
Copper(II) chloride and copper(II) carbonate are blue
Antworten
- True
- False
Frage 4
Frage
What temperature is optimum for enzymes in yeast in fermentation? (degrees Celsius)
Antworten
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37
-
60
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62
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20
-
35
Frage 5
Frage
What is a bung used for in fermentation?
Antworten
-
let Carbon Dioxide out and prevent entry of Oxygen
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let Oxygen out and prevent entry of Carbon Dioxide
Frage 6
Frage
Tick all reasons why the fermentation reaction might stop.
Antworten
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An excess in conc. of alcohol
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The yeast dies
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Glucose finishes up
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Nepal earthquake
Frage 7
Frage
What might you use to cool the gases in fractional distillation by absorbing heat from them
Antworten
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Condenser
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Glass beads
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Liquifying column
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Copper wire
Frage 8
Frage
Which indicator is yellow at a low pH and blue at a high pH?
Antworten
-
Universal Indicator
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Methyl Orange
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Phenolphtalein
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Bromothymol
Frage 9
Frage
What is the colour change when testing for water with Anhydrous Cobalt(II) Chloride
Antworten
-
white to blue
-
blue to pink
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pink to green
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blue to colourless
Frage 10
Frage
Complete the equation: Acid + Carbonate →
Antworten
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Salt + Water + Carbon Dioxide
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Salt + Carbon Dioxide
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Salt + Water + Carbon
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Water + Carbon Dioxide
Frage 11
Frage
Complete the equation: Acid + Alcohol →
Antworten
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Ester + Water
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Ester + Hyrdogen
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Alkene + Hydrogen
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Alkene + Water
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