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