Question

Conduct experience for the presence of carbohydrates proteins and fats

Answer 1

Test for carbohydrates and proteins in any foodstuff is done with the extract of the foodstuff. These tests do not restrict each other. Test for carbohydrates and proteins confirm the presence of these molecules in the food.

Q . How can you test the presence of carbohydrates and fats in our diet?

Theory: ❤︎

Molisch's test – Given sample food + Molisch's reagent → Purple or violet ring confirms the presence of carbohydrate.

Fehling's test – Given sample food + Fehling's reagent → Red precipitate confirms the presence of carbohydrates.

Answer 2

Answer:

test the presence of carbohydrates, proteins, fats and oils in the given food sample, first the extract of the given foodstuff should be prepared. Dry the given foodstuff in the mortar with a pestle or by boiling with minimum quantity of water extracting with a small quantity of an organic solvent after grinding the foodstuff.

Some of the examples of preparing extract of food stuff is given below.

For potatoes – cut to slices and boil with water.

For butter – test directly

For grapes – Extract the juice.

For boiled egg – take the white portion grind and shake with water.

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