Question

Describe an activity to show the presence of carbohydrates in a food item. (3)
(Write proper steps in 40-50 words)

Answer 1

Answer:

According to the Euclidean division algorithm, if we have two integers say a, b ie., 42, 64 the largest number should satisfy Euclid's statement a = bq + r where 0 ≤ r < b and get the highest common factor of 42, 64 as 2.

Answer 2

Answer:

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

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

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

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