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Q: Which food turned blue-black with iodine solution?
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What indicator substance is used to test a leaf for starch?

Iodine Solution is used to determine whether starch is present.


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.


Is there a method for detecting starch without using iodine?

if you put iodine in food and it contains starch it should change color.


When iodine solution is mixed with an unknown sample of food the mixture turn blue black this color change indicates the presence of?

An enzyme.


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.


Where can you find potassium iodine in food?

Iodine is in salt


How do you get iodine in foods?

Iodine is found in foods with seaweed. To add iodine to your food, add kelp, wakame, or kombu to the food while cooking.


What type of food will give a negative Iodine test and a positive Biuret Solution test?

An iodine test is used to test for the presence of starch (or polysaccharides, specifically amylose or amylopectin). A Biuret solution test is used as an indicator for peptide bonds within proteins. Therefore, if you get a negative iodine test and a positive Biuret test, you would probably be testing a animal food source (beef, chicken, pork). Overall, any food that doesn't have starch present within it would be appropriate to use. Hope this helps!


What are three food examples of solutions?

Iodine Solution, Benedict's Solution and Sucrose Solution. x = 6 z = 0 Θ = 3/2 Π


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


What food has iodine in in it?

seafood,fish,yogourt,eggs,strawberries have iodine in them


What is the maximum permissible limit of iodine in food?

The most amount of Iodine that is allowed in food, is 50mg, any higher and it is actually illegal.