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What indicates a test for catalase production is positive?
A positive catalase test result is indicated by the presence of bubbles or effervescence when hydrogen peroxide is added to the test organism. This indicates the production of the enzyme catalase, which breaks down hydrogen peroxide into water and oxygen gas.
Sugar and iodine are mixed?
It turns clear and then turns to a dark blueish purple.It would be considered as a chemical reaction.It also takes a while for it to go though this process, but it's worth it.Nora (:
Why did a solution of saliva and oats test positive with benedict's test and iodine test if the oats alone tested positive only in the iodine test and the saliva alone was negative for both?
Saliva contains the enzyme amylase which breaks down starches in oats into simple sugars like glucose, which can then react with Benedict's solution to give a positive test result. The iodine test detects the presence of starch, which is in oats but not in saliva, explaining why the combination tested positive in both tests.
What is a positive result for the fehlings test?
A positive result for the Fehling's test indicates the presence of a reducing sugar such as glucose or fructose in the solution. This is shown by the formation of a brick-red precipitate when the Fehling's reagent is added and heated with the sugar solution.
What will happen if you put iodine on confectioners sugar?
If you put iodine on confectioners' sugar, the iodine will not react significantly with the sugar itself, as sugar does not contain starch, which is what iodine typically tests for. Instead, the iodine may simply stain the sugar, resulting in a darkened appearance. This is because iodine can create a colored complex with certain compounds, but in the case of pure sugar, there won't be a notable chemical reaction.
What indicates a positive result for the benedicts test?
Benedict’s is used to test for glucose but not for sucrose. The test involves heating the sugar with either of the chemicals and observing the color change of blue to orange.Positive is a change of blue to orange.
What happens if you mix powdered sugar and iodine together?
Mixing powdered sugar and iodine will not have any significant reaction, as iodine is not a strong enough oxidizing agent to react with the sugar. The two substances will likely remain as separate particles with the iodine coloring the sugar.
Why does iodine react with sugar?
Iodine reacts with sugar due to a chemical reaction called iodine starch reaction. Iodine forms a complex with starch molecules, giving a characteristic blue-black color. As sugar molecules can also form a complex with iodine, they can interfere with the reaction, leading to a color change.
Which one of these starch fat protein and sugar will be a positive result for a bar?
PROTEIN
Does sugar turn blue when mixed with iodine?
Yes, sugar does not turn blue when mixed with iodine. Iodine reacts with starch, turning it into a blue-black color. Sugar does not contain starch, so it will not have a reaction with iodine in this way.
What happens when you mix sugar and iodine?
When sugar and iodine are mixed together, the iodine will not react with the sugar. The iodine may simply dissolve into the sugar, giving it a purplish color. This reaction is purely physical and does not involve a chemical change.
What color does sugar turn when you add iodine to it?
Well, isn't that just a happy little accident! When you add iodine to sugar, it turns a dark purple or black color. It's like a beautiful, unexpected transformation right before your eyes. Just remember, every color has its place in the palette of life.
