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?
alkyl group
carbonyl group
carboxyl group
hydroxyl group
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Where is the carbonyl group located in an aldehyde?
at the end of the carbon chain
within 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?
sodium borohydride
potassium dichromate(VI)
hydrogen peroxide
sodium hydroxide
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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 reduced to the chromium(III) ion
it is oxidised to the chromium(II) 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 green
blue to green
orange to blue
green to orange
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How can you control the oxidation of a primary alcohol to stop at the aldehyde product?
heating with concentrated sulfuric acid
heating with sodium hydroxide
refluxing with acidified K2Cr2O7
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?
secondary alcohol
tertiary alcohol
primary alcohol
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Which of the following statements is true about the oxidation of ketones by acidified K2Cr2O7?
ketones can be oxidised further to esters
ketones cannot be oxidised further by acidified K2Cr2O7
ketones can be oxidised further to carboxylic acids
ketones can be oxidised further to aldehydes
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Which of the following is an example of an aldehyde?
propanoic acid
butanone
propanone
ethanal
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Which of the following is an example of a ketone?
propanal
ethanoic acid
propanone
methanol
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What type of reaction occurs when a primary alcohol is converted to an aldehyde or carboxylic acid?
hydrolysis
esterification
reduction
oxidation
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