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WorksheetsAlcohols
Total questions: 20
Worksheet time: 10mins
Which one of these is a secondary alcohol?
Butan-1,4-diol
2-methylpropan-2-ol
Pentan-2-ol
Pentan-1-ol
The strongest type of intermolecular force in alcohols is
Van der Waals'
Covalent Bonding
Hydrogen Bonding
Organic
If ethanol is oxidised under reflux, the product will be
Ethanoic Acid
No Reaction
Ethanone
Ethanal
What type of organic product is formed from the oxidation of a secondary alcohol?
Carboxylic acid
Aldehyde
Ketone
Alkene
Fehling's reagent shows the following colour change when added to an aldehyde
Colourless to silver mirror
Brick red to blue
Stays blue
Blue to brick red
Dehydration of an alcohol gives
an aldehyde
an alkane
an alkene
a ketone
Which condition is not required for fermentation?
Absence of air
35C
High pressure
Yeast
Ethanol can also be made by _________ of ethene
Substitution
Oxidation
Hydration
Distillation
Fehling's reagent shows the following colour change when added to a ketone
Blue to brick red
Colourless to silver mirror
Stays blue
Silver to colourless
Carbon neutral means
Does not turn litmus paper red
No net production of CO2
Does not produce toxic CO
Made from organic material
Complete combustion of alcohols produces
CO2 and CO
Carboxylic acids
CO and H2O
CO2 and H2O
Tollens' reagent shows the following colour change in a ketone
Colourless to silver mirror
Blue to brick red
Stays colourless
Stays blue
Which type of alcohol oxidises fastest?
Primary
Secondary
Tertiary
Diol
Tollens' reagent shows the following colour change in an aldehyde
Colourless to silver mirror
Stays colourless
Blue to brick red
Stays blue
Oxidising reagents are represented by the following symbol in equations
OH-
O
[O]
Ox.
Primary alcohols are oxidised to
Ketones
Carboxylic acids then aldehydes
Aldehydes then carboxylic acids
No reaction
Acidified potassium dichromate (VI) has the following colour change during oxidation
Green to orange
Blue to red
Orange to green
Colourless to silver
What charge do the orange potassium dichromate ions have?
+3
-6
+6
-3
What charge do the green chromium ions, formed during the reduction of potassium dichromate(VI) ions, have?
+3
-6
+6
-3
Why is acidified potassium dichromate(VI) a better oxidising agent to use instead of oxygen during combustion?
It is carbon neutral
It keeps the carbon skeleton intact
It is a faster reaction
It leads to a greater percentage yield
