Questão 1
Questão
Which of these best describes an alcohol?
Questão 2
Questão
What is the definition of 'homologous series'?
Questão 3
Questão
Which of these are characteristics of a homologous series?
Responda
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The members of the homologous series have the same functional group
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The members of the homologous series always contain ethene.
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The members of the homologous series share a specific formula.
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The members of the homologous series share a general formula.
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The members of the homologous series have a common general method of preparation.
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The members of the homologous group all have low melting points.
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The members of the homologous group have similar chemical properties.
Questão 4
Questão
There are [blank_start]two[blank_end] main processes involved in the [blank_start]industrial[blank_end] preparation of ethanol. [blank_start]Hydration[blank_end] of ethene involves [blank_start]cracking[blank_end] hydrocarbons produced from [blank_start]petroleum.[blank_end] Ethene then reacts with [blank_start]steam[blank_end] to produce ethanol. Another method is called [blank_start]Fermentation[blank_end] which involves [blank_start]sugars[blank_end] being converted into ethanol.
Responda
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two
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industrial
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Hydration
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cracking
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petroleum.
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steam
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Fermentation
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sugars
Questão 5
Questão
The reaction between an alcohol and a [blank_start]carboxylic acid[blank_end] gives an [blank_start]ester[blank_end]
Questão 6
Questão
The ideal conditions for hydration of ethene is a temperature of [blank_start]300[blank_end] and pressure of [blank_start]60-70[blank_end] atmospheres.
Responda
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300
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200
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420
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137
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60-70
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70-80
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30-40
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90-100
Questão 7
Questão
With regards to temperature to complete hydration of ethene, which statement is true?
Responda
-
A higher yield of ethanol would be produced at lower temperatures
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A higher yield of ethanol would be produced at higher temperatures
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The temperature has no effect on the yield of ethanol produced
Questão 8
Questão
[blank_start]High[blank_end] pressure leads to a high yield of ethanol.
Questão 9
Questão
Which of these is missing from the end of this formula representing hydration of ethene? CH2 = CH2(g) + H2O(g) <>
Responda
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CH2CH2OH(g)
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CH3CH2OH(g)
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CH4CHOH(g)
Questão 10
Questão
Which of these better depicts the definition of a functional group?
Responda
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specific groupings of atoms within molecules that have their own characteristic properties, regardless of the other atoms present in a molecule.
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specific groupings of atoms within molecules that have their own characteristic properties, based of the number of carbons present
Questão 11
Questão
Which of these molecules is the functional group.
Questão 12
Questão
Label this diagram of fractional distillation. The method of which alcoholic drinks are produced (fermentation)
Responda
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Thermometer
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out
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in
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bunsen burner
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round-bottom
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fractionating
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Glass beads
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Condenser
Questão 13
Questão
The boiling temperature of ethanol is [blank_start]80[blank_end] degrees and therefore to separate it from an aqueous mixture, [blank_start]fractional distillation[blank_end] is needed.
Responda
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80
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fractional distillation
Questão 14
Questão
Ideal conditions for fermentation include...
Responda
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sugar, warm place and a yeast catalyst
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cold place and a yeast catalyst
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glucose, warm place and a yeast catalyst