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- 1. Multiple Choice
Which is a secondary alcohol?
- 2. Multiple Choice
Which alcohol cannot be oxidized by a warm acidified solution of potassium dichromate(VI)?
2-methylpropan-1-ol
propan-1-ol
butan-2-ol
2-methylpropan-2-ol
- 3. Multiple Choice
What organic product will be formed when pentan-2-ol is oxidized by an acidified solution of potassium dichromate(VI).
pentanal
pentan-3-one
pentan-2-one
pentanoic acid
- 4. Multiple Choice
Ethanol can be oxidized first to ethanal and then to ethanoic acid when it is heated under reflux with an acidified solution of potassium dichromate(VI). What method can be used to obtain ethanal from this reaction before it reacts further to form ethanoic acid?
Filter off the ethanal as soon as it is formed in the mixture.
Add sodium hydroxide to neutralize any acid that is formed.
Carry out the reaction at room temperature.
Distil the ethanal off from the reaction mixture as soon as it forms.
- 5. Multiple Choice
What colour change will be observed when an acidified solution of potassium dichromate(VI) is added to an excess of a secondary alcohol and the mixture is warmed?
from green to orange
from pink to colourless
from orange to green
from colourless to pink
- 6. Multiple Choice
Which can undergo oxidation and still retain the same number of carbon atoms in the longest chain?
I. primary alcohols
II. aldehydes
III. secondary alcohols
I and II only
I, II and III
I and III only
II and III only
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