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Tests for functional groups

Description

A - level chemistry AQA tests for functional groups that you need to know
Simran Kaur
Flashcards by Simran Kaur, updated more than 1 year ago More Less
Wannie Chisala
Created by Wannie Chisala about 10 years ago
Simran Kaur
Copied by Simran Kaur over 7 years ago
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Resource summary

Question Answer
Test for alkene Reagents: Bromine water Positive Test: decolourises (from brown)
Test for haloalkane Reagents: add NaOH and warm, acidify with HNO3 (to remove carbonate ions) then add AgNO3. Positive Test: white precipitate (chloride), cream precipitate (bromide), yellow precipitate (iodide)
Test for alcahol (primary or secondary) Reagents: Acidified Potassium Dichromate Positive Test: Orange to green
Test for aldehyde Reagents: Fehlings solution Positive test: Blue to brick red precipitate OR Reagents: Tollens solution Positive Test: Silver mirror formed
Test for carboxyllic acid Reagents: Na2CO3 Positive Test: Effervescense
Test for acylchloride Reagents: Add acidified silver nitrate Positive test: Vigorous reaction and white precipitate
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