tests

Question 1

what is the test for an alkene

Answer 1

bromine water
orange/brown to colourless

Question 2

what is the test for cl2

Answer 2

add NaOH, silver nitrate and neutralise by nitric acid
white precipitate

Question 3

what is the test for br2

Answer 3

add NaOH, silver nitrate and neutralise by nitric acid
cream precipitate

Question 4

what is the test for I2

Answer 4

add NaOH, silver nitrate and neutralise by nitric acid
yellow precipitate

Question 5

what is the test for alcohols

Answer 5

acidified potassium dichromate
orange to green

Question 6

what is the test for an aldehyde

Answer 6

tollens reagent - silver mirror
fehlings - brick red precipitate

Question 7

what is the test for a carboxylic acid

Answer 7

sodium hydrogen carbonate - bubbles of CO2 form. bubble through limewater turns cloudy

Question 8

will a tertiary alcohol oxidise

Answer 8

no - because there is no hydrogen to attack

Question 9

how do you get a ketone

Answer 9

a secondary alcohol under reflux in acidic conditions with an oxidising agent

Question 10

how to test for ketones

Answer 10

fehlings - no change