3.3.6 Organic testing

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Last updated 8:38 AM on 6/23/26
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5 Terms

1
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Test for Alcohols:

Reagent: Acidified potassium dichromate

reaction: If 1y or 2y are present it turns orange → green

2
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Test for Aldehydes:

Reagent: Tollen’s reagent

Reaction: If aldehyde is present silver mirror precipitate forms

Reagent: Fehlings solution

Reaction: If aldehyde is blue → brick red precipitate forms

3
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Test for Carboxylic acid:

Reagent: NaCO3

Reaction: Produces CO2 which can be bubbled into lime water. If CO2 is present colourless → cloudy

4
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Test for Alkenes:

Reagent: Bromine water

Reaction: orange → colourless

5
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Test for Halogenoalkanes:

Reagents: NaOH, Acidified AgNO3

Reaction: white precipitate formed