food tests

Question 1

what does benedicts test for

Answer 1

reducing sugars

Question 2

What is the method for the benedicst test

Answer 2

5 cm^3 of solution and ten drops of benedicts solution

place in water bath 75 degrees C

Question 3

what is is the outcome of the benedicts test

Answer 3

green/yellow/ brick red if reducing sugars are present (depends on the concentration)
stays blue if not

Question 4

what does the iodine test test for

Answer 4

starch

Question 5

what is the result of the iodine test

Answer 5

brown if no starch

bluey black if starch is present

Question 6

what does the biuret test test for

Answer 6

protein

Question 7

what is the method for the biuret test

Answer 7

2cm^3 of solution + 2 cm^3 of biuret solution

shake

Question 8

what is the result of the biuret test

Answer 8

Blue –> pink/purple if protein present

Question 9

what does the emulsion test test for

Answer 9

Lipids

Question 10

what is the result of the emulsion test

Answer 10

Solucion turns cloudy

Question 11

what is an issue with these food test

Answer 11

not quantative only qualitive (doesn’t mention how much)