WorksheetsIodine Starch Quiz
Total questions: 7
Worksheet time: 12mins
What colour does iodine turn in the presence of starch?
Iodine turns green in the presence of starch.
Iodine turns red in the presence of starch.
Iodine turns blue-black in the presence of starch.
Iodine turns yellow in the presence of starch.
Did you know that the iodine starch test is also used in the food industry? The aim is...
The identification of the presence of protein in food products
The detection of the presence of starch in food products, as in milk products or in processed foods
The determination of the acidity of food products
The detection of the presence of sugar in food products
Do you think it is possible the test has some limitations?
No, iodine is a complete and reliable indicator for starch
Yes, iodine may give false negative results in the presence of certain substances
Yes, because iodine can only detect starch in liquid form
Yes, iodine may not detect certain forms of starch and may give false positive results in the presence of certain substances
What are the steps involved in conducting the iodine starch test?
Use a UV light to observe the colour change
Add sugar to the iodine solution
Add a few drops of the iodine solution to the sample and observe the color change
Boil the sample for 10 minutes
Do you know that some alternative methods for testing the presence of starch exist?
A pH test strip
Starch-agar plate, or starch indicator solution.
Glucose test strip
Protein indicator solution
What are the safety precautions to be taken while using iodine for testing starch?
Wearing sandals and shorts for better ventilation
Using iodine in a closed, unventilated room
Wear gloves, goggles, and a lab coat to protect the skin and eyes from contact with iodine
Disposing of iodine waste in the regular trash bin
Do you think that temperature may affect the iodine starch reaction?
No, temperature does not influence the rate of the reaction
Yes, iodine starch reaction only occurs at extremely high temperatures
Yes, temperature affects the iodine starch reaction by increasing the rate of the reaction at higher temperatures and decreasing the rate at lower temperatures.
Yes, the reaction occur only at very low temperatures
