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Potato, cornstarch, rice, or bread can turn blue-black with iodine solution due to the presence of starch.

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1y ago

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Related Questions

What indicator substance is used to test a leaf for starch?

Iodine Solution is used to determine whether starch is present.


What are the roles of iodine solution copper ii sulphate solution and Benedict's solution in food test?

Iodine solution is used to test for the presence of starch in food. Copper II sulfate solution is used to test for the presence of proteins in food. Benedict's solution is used to test for the presence of reducing sugars, such as glucose, in food.


What is the food test for starch?

It is simply called the Starch test which is the process of testing something for the presence of starch. Add Iodine solution to whatever is it you're testing and a dark blue/black color indicates the presence of starch


When you add iodine solution on a starch food the color would be?

Blue-black.


What is the food test that remains brown after 2 drops of iodine solution?

The food test that remains brown after 2 drops of iodine solution typically indicates the absence of starch. Iodine solution turns blue-black in the presence of starch, so if it remains brown, it suggests that the tested food does not contain significant amounts of starch, possibly indicating the presence of sugars or proteins instead.


What does iodine solution indicate?

Iodine solution is commonly used as an indicator in starch tests. When iodine solution is added to a substance, such as food or a biological sample, it turns blue-black in the presence of starch. This color change indicates the presence of starch in the sample.


How can you test for presence of starch in Food items?

To identify the presence of starch in Food items; Iodine Test: (specific for starch) Principle: When boiled with water starch molecules form dispersion surfaces having affinity for Iodine molecules. When added, iodine molecules get adsorbed on starch grains producing intense blue colour. Reagent: 1) Iodine solution(2 grams of 12 dissolved in 6% KI) 2) 1% starch solution (Dissolve 1 gram of starch in 100mL of boiling water). Procedure: Take 2mL of food extract or 2mL of starch solution in a test tube and add a few drops of iodine solution to it. Note the change in colour. Result: If a blue black develops then starch is present. Colour due to adsorption.


What can YOU use to test if starch is present in our food?

You can use iodine solution to test for the presence of starch in food. When iodine comes into contact with starch, it changes color from brown to blue-black.


When iodine solution is mixed with an unknown sample of food the mixture turns black this indicates the present of?

starch in the food sample. Iodine solution reacts with starch to produce a dark blue or black color, indicating the presence of starch in the test sample.


What are the food tests for starch?

The food test for starch involves adding iodine solution to a sample. If starch is present, the solution will turn blue-black. This test is commonly used in biology and chemistry experiments to detect the presence of starch in various food samples.


What is the iodine test used to test for?

The iodine test is used to test for the presence of starch. Iodine solution interacts with the starch molecules, causing a color change from brownish-yellow to blue or black.


What is the purpose of adding iodine solution to the onion slide preparation?

Type your answer here... It depends on what you mean by a solution. An Iodine solution can be used as a disinfectant. Iodine can be used in water supplies to help clean the water. Iodine itself is essential for good health, so it's been put in table salt to make sure we all get enough of it in our diet.