Welcome to the Quiz!
This quiz contains 11 questions from a mix of 1 subtopics.
What functional group is present in both aldehydes and ketones?
hydroxyl group
carbonyl group
alkyl group
carboxyl group
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Where is the carbonyl group located in an aldehyde?
within the carbon chain
at the end of the carbon chain
between two carbon chains
at the beginning of the carbon chain
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Which of the following can be used as an oxidising agent to convert primary alcohols to aldehydes and carboxylic acids?
hydrogen peroxide
sodium borohydride
sodium hydroxide
potassium dichromate(VI)
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What happens to the dichromate(VI) ion during the oxidation of primary alcohols?
it is reduced to the chromium(II) ion
it is oxidised to the chromium(II) ion
it is reduced to the chromium(III) ion
it is oxidised to the chromium(III) ion
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Which of the following best describes the colour change observed when dichromate(VI) ion is reduced to chromium(III) ion?
orange to blue
green to orange
orange to green
blue to green
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How can you control the oxidation of a primary alcohol to stop at the aldehyde product?
refluxing with acidified K2Cr2O7
heating with concentrated sulfuric acid
heating with sodium hydroxide
gently heating with acidified K2Cr2O7 in a distillation set-up
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What type of alcohol can be oxidised to form a ketone?
primary alcohol
secondary alcohol
tertiary alcohol
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Which of the following statements is true about the oxidation of ketones by acidified K2Cr2O7?
ketones cannot be oxidised further by acidified K2Cr2O7
ketones can be oxidised further to aldehydes
ketones can be oxidised further to carboxylic acids
ketones can be oxidised further to esters
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Which of the following is an example of an aldehyde?
propanone
propanoic acid
butanone
ethanal
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Which of the following is an example of a ketone?
propanone
ethanoic acid
propanal
methanol
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What type of reaction occurs when a primary alcohol is converted to an aldehyde or carboxylic acid?
oxidation
esterification
reduction
hydrolysis
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