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A reducing sugar refers to a sugar that either has an aldehyde group or is capable of isomerism. Some common oxidizing agents that are used to test for the presence of a reducing sugar are Benedict's solution, Fehling's solution and Tollen's reagent.
Wiki User
∙ 9y ago
Wiki User
∙ 11y ago-take the food sample to be tested
-add it in a test tube
-add some water to it
-then add benedict reagent to the mixture
-and heat it in water bath (that may be in a beaker)
-a green/brown/yellow/orange/brick red appears if reducing sugars is present
-if not then it would remain blue ..
hope this helps :)
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takudzwa neshena
BENEDICT NSOLUTIN(alkaline copper sulphate solution citrate )
fehlings solution
albustic paper
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∙ 11y agoonion,sugar cane, carrot,Irish potato
Wiki User
∙ 13y agoMost common is Fehlin's solution
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∙ 13y agobenedict's test
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Why pyrrole-2-aldehyde does not respond to tollens reagent?
Pyrrole-2-aldehyde does not respond to Tollens reagent because it is not a reducing sugar. Tollens reagent (silver nitrate) is used to test for the presence of aldehyde groups, which are commonly found in reducing sugars. Reducing sugars contain aldehyde groups and are capable of donating electrons to Tollens reagent, forming a silver mirror on the test tube wall. Pyrrole-2-aldehyde does not contain aldehyde groups, and therefore is not a reducing sugar. As a result, it does not react with Tollens reagent.
Which sugar gives a negative reaction to Benedict reagent?
Benedict's reagent is a type of chemical that is used to test if reducing sugars are present or not. The chem'ical is named after Stanley Rossiter Benedict.
Why is hydrochloric acid used when testing for non-reducing sugars?
to hydrolise sucrose solution into a monosaccharide ( glucose and fructose )
What is non-reducing sugar?
Non-absorbable sugars are also called sugar alcohols. They are sweet-tasting, but are not readily absorbed from the intestine into the body. Most are manufactured for commercial use. Examples are non-caloric sweeteners, like sorbitol and mannitol, which are often used in candies and gums. Non-absorbable sugars may be prescribed as laxatives.
What is gold Reagent?
Gold Reagent is used to precipitate Gold It is the part of Aqua Regia Process
what is fehling test?
It is a chemical reagent used to differentiate water-soluble carbohydrates and ketone functioning groups. Its also a test for reducing and non-reducing sugars.
Why pyrrole-2-aldehyde does not respond to tollens reagent?
Pyrrole-2-aldehyde does not respond to Tollens reagent because it is not a reducing sugar. Tollens reagent (silver nitrate) is used to test for the presence of aldehyde groups, which are commonly found in reducing sugars. Reducing sugars contain aldehyde groups and are capable of donating electrons to Tollens reagent, forming a silver mirror on the test tube wall. Pyrrole-2-aldehyde does not contain aldehyde groups, and therefore is not a reducing sugar. As a result, it does not react with Tollens reagent.
Which sugar gives a negative reaction to Benedict reagent?
Benedict's reagent is a type of chemical that is used to test if reducing sugars are present or not. The chem'ical is named after Stanley Rossiter Benedict.
What does Benedict's reagent detect?
Benedict's reagent is used as a test for the presence of all monosaccharides, and generally also reducing sugars. These include glucose, galactose, mannose, lactose and maltose. Even more generally, Benedict's test will detect the presence of aldehydes (except aromatic ones), and alpha-hydroxy-ketones, including those that occur in certain ketoses. - wikipedia
When glycogen is added to benedicts reagent why would it remains blue?
Although glycogen is a carbohydrate, it is classified under POLYSACCHARIDES which are non-reducing sugars. Benedict's reagent is used to test for the presence of non-reducing sugars. The positive result for this is a brick-red precipitate or solution. It remained blue (which is negative) due to fact that ALL POLYSACCHARIDES (such as glycogen) ARE NON-REDUCING SUGARS > I'm a Nursing Student. >M.J.T.M.E.
What is the difference between Benedict's Reagent and Biuret Reagent?
Benedicts reagent is used to check reducing sugars , it need hat to work and gives red color when positive ,. While biuret reagent is for proteins .there is no need to use heat and gives purple , violet color when positive ..
What is Benedict test for?
You must take the testing object, then add Benedict's solution in a test tube. Then in a boiling beaker of water, place the test tube in. Let it sit there and see if there is any color change or precipitated materials.
What is the reagent used to test for complex sugars?
benidict's solution
Why is hydrochloric acid used when testing for non-reducing sugars?
to hydrolise sucrose solution into a monosaccharide ( glucose and fructose )
What comprises Lloyd's reagent?
Lloyd's reagent is a mixture of two chemicals: N,N'-dimethyl-p-phenylenediamine and hydrochloric acid. It is used in the quantitative analysis of sugars, where it reacts with reducing sugars to form a colored product that can be measured spectrophotometrically.
Does starch contain reducing sugars?
The Fehling's and the Benedict's Test are the just two of the many tests conducted in identifying reducing and non-reducing sugars. Reducing sugars like the monosaccharides can reduce cupric hydroxide from the reagents used. This is because the reducing sugars have a free oH group at their anomeric carbon that can cause the reduction of mild oxidizing agents like fehling and Benedict solution.In non reducing sugars this oH is involved in glycosidic bond formation.
What is the reagent used to test carbohydrates?
Two of the most common reagents used to test for the presence of sugar are Clomydihol and Marsupialinate. Both were found by pure accident by famous Dutch scientist Jelii Clubenin in the late 1800's while he was working on finding a cure for the common flu.
