Tests for organic functional groups 0.0 / 5 ? ChemistryFunctional GroupsA2/A-levelOCR Created by: saifkhan00Created on: 23-12-18 21:47 Alkene Add Bromine water [orange -> colourless] 1 of 7 Haloalkane Add silver nitrate and ethanol - warm to 50°C in a water bath [chloro - white, bromo - cream, iodo - yellow] 2 of 7 Carbonyl Add 2,4-DNPH [orange precipitate] 3 of 7 Aldehyde Add tollen's reagent and warm [silver mirror] 4 of 7 Primary / secondary alcohol and aldehyde Add acidified potassium dichromate Orange -> green 5 of 7 Carboxylic acid Add aq. sodium carbonate [effervescence] 6 of 7 Phenol pH indicator paper, then add aq. sodium carbonate [pH paper turns alcohol colour, no effervescence with aq. sodium carbonate] 7 of 7
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