Question

EXPERIMENT
1
DATE :
Aim: To show that saliva converts starchy foods into sugar.​

Answer 1

Answer:

EXPERIMENT

1

DATE :

Aim: To show that saliva converts starchy foods into sugar.

Answer 2

Aim of the experiment: To study the effect of saliva in food.

Materials required: Boiled rice, water, test tubes, dropper, water bath and Bendict's reagent

Procedure:-

• Take two test tubes and label them as 'A' and 'B'.
• Put one teaspoon of boiled rice in test tube A and one teaspoon of boiled rice in teaspoon B.
• Add 3-4m of water to each of the test tubes.
• Use a dropper to add 3-4 drops of Bendict's reagent to both of the test tubes.
• Heat the test tubes in a water bath and leave it for 10 minutes.

Observation:- In test tube A, there is no colour change of the solution. In test tube B, the colour of the solution changes to brick red.

Conclusion:- Bendict's reagent turns brick red if sugar is present in the solution. As saliva breaks down the starch present in the food into simple sugars (maltose), the test for the sugar is positive in test tube B.