BIOMOLECULES AND ENZYMES

BIOLOGY

CARBOHYDRATES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following tests for starch?
A
Iodine
B
Benedict’s
C
Biuret
D
Emulsion
Explanation: 

Detailed explanation-1: -Iodine Solution is used to test the presence of starch.

Detailed explanation-2: -Using iodine to test for the presence of starch is a common experiment. A solution of iodine (I2) and potassium iodide (KI) in water has a light orange-brown color. If it is added to a sample that contains starch, such as the bread pictured above, the color changes to a deep blue.

Detailed explanation-3: -A chemical test for starch is to add iodine solution (red) and see if it turns blue/black in colour. It is possible to distinguish starch from other carbohydrates using this iodine solution test.

Detailed explanation-4: -Starch Test: Add Iodine-KI reagent to a solution or directly on a potato or other materials such as bread, crackers, or flour. A blue-black color results if starch is present. If starch amylose is not present, then the color will stay orange or yellow.

Detailed explanation-5: -The iodine test for starch is mainly performed to test the presence of carbohydrates. The food products which we eat include different types of carbohydrates, among which starch and sugars are the main carbohydrates found in our food products.

There is 1 question to complete.