Colour changes/ identiting unknowns

Question 1

Alcohol

Answer 1

-positive test - orange K2Cr2O7 turns green
-acidified KMnO4 = purple to colourless
-water miscible - soluble

Question 2

Alkane

Answer 2

-bromine water = orange Br2 slowly decolourises with UV light
- immiscible in water

Question 3

Alkene

Answer 3

-acidified KMnO4 = purple turns colourless
-bromine water = orange decolourises quickly
-immiscible

Question 4

Alkyne

Answer 4

-acidified KMnO4 = purple turns colourless
-bromine water = orange decolourises quickly

Question 5

Haloalkane

Answer 5

-immiscible in water

Question 6

Amine

Answer 6

-miscible and immiscible in water
-damp red litmus = turns blue

Question 7

Carboxylic acid

Answer 7

-Insoluble
-blue litmus turns red
-carbonate & metal = fizzing