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This quiz contains 10 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?

2,4-DNPH

Tollens' reagent

Fehling's solution

alkaline iodine solution

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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 boiling point

by measuring the derivative's solubility

by observing the derivative's colour

by measuring the derivative's melting point

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Which of the following reagents is a colourless solution containing complexed silver ions?

Tollens' reagent

Fehling's solution

acidified potassium dichromate

alkaline iodine solution

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What is the observation when an aldehyde is warmed with Tollens' reagent?

the solution turns from orange to green

a red precipitate forms

a silver mirror forms on the test tube walls

the solution remains colourless

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What is the observation when a ketone is warmed with Tollens' reagent?

a yellow precipitate forms

a red precipitate forms

the solution remains colourless

a silver mirror forms on the test tube walls

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Which of the following contains blue copper(II) complex ions dissolved in aqueous sodium hydroxide?

Tollens' reagent

Fehling's solution

alkaline iodine solution

acidified potassium dichromate

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What is the observation when an aldehyde is warmed with Fehling's solution?

the solution remains blue

a brick-red precipitate forms

a yellow precipitate forms

a silver mirror forms on the test tube walls

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What type of ketones can be detected using an alkaline iodine solution?

ethyl ketones

diketones

propyl ketones

methyl ketones

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What is the yellow precipitate formed when a methyl ketone is warmed with an alkaline iodine solution?

iodine (I2)

iodomethane (CH3I)

triiodomethane (CHI3)

sodium iodide (NaI)

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