b3 Flashcards
1
Q
What is solution is used to test for starch?
A
iodine tests for starch
if present: yellow/red iodine solution turns blue/black
2
Q
What does benedicts solution test for?
and what is the positive test?
A
Tests for sugars If positive (sugar present) then the blue benedicts solution turns brick red when heated
3
Q
Test for protein?
A
Biuret test - If positive (protein present) then Blue Biuret reagent turns purple
4
Q
What is used to test for Lipids?
A
Ethanol test If positive (present for lipids) then ethanol forms a cloudy white layer
5
Q
Why should we be careful when testing for Lipids?
A
As ethanol test is highly flammable and harmful
6
Q
Why should we be careful when testing for Proteins? and what equipment should be used for it?
A
As the Biuret test is corrosive
[So wear goggles to prevent chemical splashing into the eyes]
