1940709
Questão 1
Questão
There are two ways to make ethanol
Responda
- True
- False
Questão 2
Questão
You can make ethanol by the dehydration of ethene and fermentation
Responda
- True
- False
Questão 3
Questão
What catalyst is used during the hydration of ethene?
Responda
-
Zymase
-
Phosphoric acid
-
Potassium dichromate
-
Sulphuric acid
Questão 4
Questão
What conditions are used during the hydration of ethene?
Responda
-
25 degrees Celsius, 60 atmospheres
-
300 degrees Celsius, 100 atmospheres
-
300 degrees Celsius, 60 atmospheres
Questão 5
Questão
Is steam used in the presence of a catalyst during the hydration of ethene?
Responda
- True
- False
Questão 6
Questão
Is the reaction of the hydration of ethene reversible?
Responda
- True
- False
Questão 7
Questão
Is this the correct equation for the hydration of ethene?
H2C=CH2 + H2O ---> CH3CH2OH
Responda
-
Yes
-
No
Questão 8
Questão
Fermentation is a method for manufacturing alcohol
Responda
- True
- False
Questão 9
Questão
What catalyst is used during the fermentation of sugars to make ethanol?
Responda
-
Phosphoric acid
-
Zymase
-
Sulphuric acid
Questão 10
Questão
What happens when temperatures exceed 37 degrees Celsius?
Responda
-
The reaction happens at a faster rate
-
The enzyme denatures
-
The reaction stays at the same rate
Questão 11
Questão
Fermentation of sugars to ethanol is aerobic
Responda
- True
- False
Questão 12
Questão
Temperatures in degrees Celsius during the reaction of fermentation can be
Responda
-
27
-
40
-
37
-
30
-
24
-
25
Questão 13
Questão
It is important that fermentation is carried out with the absence of air. This is to prevent the oxidation of ethanol to undesired products, such as ethanal and ethanoic acid, which would affect the flavour of the product
Responda
- True
- False
Questão 14
Questão
The equation for fermentation is
C6H12O6 ----> 2CH3CH2OH + 2CO2
Responda
- True
- False
Questão 15
Questão
What are the conditions and catalyst used during fermentation?
Responda
-
300 degrees Celsius
-
37 degrees Celsius
-
Phosphoric acid
-
Zymase
Questão 16
Questão
_________ is the ease that a liquid turns into a gas
Responda
-
Physical properties
-
Volatility
-
A bond
-
Polarity
Questão 17
Questão
Volatility increases as boiling point increases
Responda
- True
- False
Questão 18
Questão
Why do alcohols dissolve in water?
Responda
-
Hydrogen bonds form between the polar -O-H groups of the alcohol and water molecules
-
Hydrogen bonds form between the non-polar -O-H groups of the alcohol and water molecules
-
No bonds form between the alcohol and water molecules which allows the alcohol to dissolve
Questão 19
Questão
Select the correct statement
Responda
-
Solubility decreases as chain length increases
-
Solubility decreases as chain length decreases
Questão 20
Responda
-
Primary
-
Secondary
-
Tertiary
Questão 21
Responda
-
Primary
-
Secondary
-
Tertiary
Questão 22
Responda
-
Primary
-
Secondary
-
Tertiary
Questão 23
Questão
Which types of alchohols can be oxidised using an oxidising agent?
Responda
-
Primary and tertiary
-
Secondary and tertiary
-
Primary and secondary
-
Primary, secondary and tertiary
Questão 24
Questão
What does this symbol represent? [O]
Responda
-
Oxidising agent
-
Reflux
Questão 25
Questão
A primary alcohol reacts under reflux with acidified potassium dichromate to produce
Responda
-
Ketone
-
Carboxylic acid
-
Aldehyde
Questão 26
Questão
A primary alcohol reacts on gentle heating to produce
Responda
-
Aldehyde
-
Carboxylic acid
Questão 27
Questão
A secondary alcohol reacts under reflux to form
Responda
-
Nothing, it doesn't react
-
A ketone
-
An aldehyde
-
A carboxylic acid
Questão 28
Questão
Tertiary alcohols react under reflux to form
Responda
-
A ketone
-
Nothing, it doesn't react as tertiary alcohols are resistant to oxidation
-
A carboxylic acid
-
An aldehyde
Questão 29
Responda
-
A ketone
-
A carboxylic acid
-
An aldehyde
Questão 30
Responda
-
A carboxylic acid
-
A ketone
-
An aldehyde
Questão 31
Responda
-
An aldehyde
-
A carboxylic acid
-
A ketone
Questão 32
Questão
Esterification is the reaction of
Responda
-
An alcohol and a ketone to produce an ester and water
-
An alcohol and a carboxylic acid to produce an ester and water
-
An alcohol and an aldehyde to produce an ester and water
Questão 33
Questão
Concentrated sulfuric acid is used as the catalyst in an esterification reaction
Responda
- True
- False
Questão 34
Questão
What is broken and formed during an esterification reaction?
Responda
-
the O-H bond in the alchohol is broken and water is formed
-
The =O bond in the alcohol is broken and water is formed
Questão 35
Questão
Propanoic acid and methanol reacts to form
Responda
-
Propyl methanoate
-
Methyl propanoate
Questão 36
Questão
An alcohol can be dehydrated to form an alkene in the presence of an acid catalyst
Responda
- True
- False
Questão 37
Questão
The dehydration of an alcohol is an example of what kind of reaction?
Responda
-
Substitution
-
Elimination
-
Nucleophilic
Questão 38
Questão
In an elimination reaction
Responda
-
2 molecules ---> 1 molecule
-
1 molecule ---> 2 molecules
Questão 39
Questão
Select the suitable acid catalysts for the dehydration of an alcohol
Responda
-
Concentrated phosphoric acid
-
Concentrated sulfuric acid
-
Zymase
-
Oxygen
-
Acidified potassium dichromate
Questão 40
Questão
Dehydration is an elimination reaction in which water is removed from a saturated molecule to make an unsaturated molecule
Responda
- True
- False
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