Question

describe an activity to test the presence of carbohydrates?​

Answer 1

Answer:

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

(2) Fehling’s test – Given sample food + Fehling’s reagent → Red precipitate confirms the presence of carbohydrates

(3) Benedict’s test – Given sample food + Benedict’s reagent → Red precipitate confirms the presence of carbohydrates.

(4) Tollen’s test – Given sample food + Tollen’s reagent → Silver mirror confirms the presence of carbohydrates.

(5) Iodine test – Given sample food + Iodine solution → Blue colour solution confirms the presence of starch.

Answer 2

Explanation:

Aim: To find the presence of carbohydrates.

Materials required: Rice powder, water, Iodine solution, test tube.

Procedure: Take rice powder in a test tube and add 0.5 ml of water to it. Then add one drop of Iodine solution to it.

Observation: A blue-black colour appears.

Inference: Carbohydrates is present in rice powder.