Food Test required practicals

Question 1

How to prepare a food sample?

Answer 1

Crush the food in a pestle and mortar, and distilled water, mix, then filter

Question 2

How to test for sugar?

Answer 2

Add benedict’s solution in a food sample which is in a water bath of 75 degrees

Question 3

If sugar is present what colour should the Benedict’s solution go?

Answer 3

FROM blue TO green,yellow or brick-red

Question 4

How to test for starch?

Answer 4

Add iodine to a food sample

Question 5

If starch is present what colour should the iodine go?

Answer 5

FROM brown-orange TO black or blue-black

Question 6

How to test for proteins?

Answer 6

Add Biuret solution to food sample

Question 7

If protein is present what colour should the Biuret solution go?

Answer 7

FROM a blue TO pink or purple

Question 8

How to test for lipids?

Answer 8

Add Sudan 3 solution to food sample (which is not filtered)

Question 9

If lipid is present what colour should the Sudan 3 solution go?

Answer 9

The Sudan 3 solution should separate from the food sample and stain the lipids red