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