Welcome to the Quiz!
This quiz contains 6 questions from a mix of 1 subtopics.
What is the name of the reagent that forms a bright orange precipitate when reacted with aldehydes and ketones?
alkaline iodine solution
Tollens' reagent
Fehling's solution
2,4-DNPH
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Which of the following compounds does NOT react with 2,4-DNPH?
aldehydes
carboxylic acids
ketones
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How can the original carbonyl compound be identified after forming a derivative with 2,4-DNPH?
by measuring the derivative's melting point
by measuring the derivative's solubility
by observing the derivative's colour
by measuring the derivative's boiling point
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Which of the following reagents is a colourless solution containing complexed silver ions?
alkaline iodine solution
Fehling's solution
Tollens' reagent
acidified potassium dichromate
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What is the observation when an aldehyde is warmed with Tollens' reagent?
the solution remains colourless
a red precipitate forms
a silver mirror forms on the test tube walls
the solution turns from orange to green
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What is the observation when a ketone is warmed with Tollens' reagent?
the solution remains colourless
a silver mirror forms on the test tube walls
a red precipitate forms
a yellow precipitate forms
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