0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Osazone test for carbohydrates?
osazone test is a carbohydrate specific reaction in which carbs react with phenylhydrazine to form osazones i.e. crystals of specific shape. thus the test confirms the presence of a particular sugar.Eg:for sucrose one gets a mixture of glucosazone and fructosazone on the basis of components of sucrose.
What type of is saccharide has no change when tested with benidicts solution?
Starch doesn't react in the Benedict test.
Why the majority said that sucrose is a ketose sugar?
The majority would be incorrect. Sucrose is not considered an aldose or a ketose, because it is a disaccharide made from glucose (an aldose) and fructose (a ketose). So, it has both properties within its structure. It is a non-reducing sugar.It is possible that many say sucrose is a ketose because sucrose will fail the Benedict's test, which is designed to detect aldoses.
Would sucrose test positive or negative with benedicts reagent?
No, surcose is a disaccharide without a hemiacetal group
What is the purpose of hydrolysis test?
There are different uses of it as it may be used to confirm sucrose by hydrolysing and than testing for reducing sugar .
Why sucrose does not give a positive Benedict's test but hydrolyzed sucrose does give a positive beneditcts test?
Sucrose is formed from glucose and fructose.Sucrose is formed from glucose and fructose. Glucose and fructose gives positive test for benedict becuz both of them are reducing sugars whereas sucrose is not a reducing sugar so it gives negative test for benedict. On prolonged heating,sucrose will form glucose and fructose (reducing sugars)which ultimately gives a positive result .
After hydrolysis did sucrose give a positive test with fehlings test why orwhy not?
After hydrolysis sucrose did give a positive test. It reduces sugar that has hemiketal and hemiaetal in it.
Why does sucrose solution give a negative test with tollen's test?
A positive Tollen's test is given by compounds that have a free aldehyde or ketone functional group. Sucrose is a disaccharide composed of the monosaccharides glucose and fructose. In sucrose, the components glucose and fructose are linked via an ether bond between C1 (carbon with aldehyde group) on the glucosyl subunit and C2 (carbon with ketone group) on the fructosyl unit. The bond is called a glycosidic linkage. In other words, in sucrose there is no free aldehyde or ketone functional group. Hence sucrose will not answer Tollen's test.
How can you test bacillus megatrium from bacillus cereus?
bacillus megatarium test positive for sucrose where creus doesnt
Can Seliwanoff's test be used to distinguish sucrose from fructose?
Yes, fructose is a ketose, for which Seliwanoff's test is most sensitive. Sucrose is neither entirely a ketose nor an aldose, but is a mixture of both. It will react, but more slowly, producing a much lighter pinkish color.
Osazone test for carbohydrates?
osazone test is a carbohydrate specific reaction in which carbs react with phenylhydrazine to form osazones i.e. crystals of specific shape. thus the test confirms the presence of a particular sugar.Eg:for sucrose one gets a mixture of glucosazone and fructosazone on the basis of components of sucrose.
Why did the enzyme lactase react with lactose but not sucrose?
Because, lactase breaks beta(1-4) glycosidic bonds between a galactose and a glucose, while sucrose molecule is formed by a dimer of a glucose and a fructose linked by an alpha(1-2) glycosidic bond.
Which of the following pairs give positive toollens test-hexanal,acetophenone and fructose,sucrose?
The simple sugars will not react with the test because they are not aldehydes.
What type of is saccharide has no change when tested with benidicts solution?
Starch doesn't react in the Benedict test.
Why the majority said that sucrose is a ketose sugar?
The majority would be incorrect. Sucrose is not considered an aldose or a ketose, because it is a disaccharide made from glucose (an aldose) and fructose (a ketose). So, it has both properties within its structure. It is a non-reducing sugar.It is possible that many say sucrose is a ketose because sucrose will fail the Benedict's test, which is designed to detect aldoses.
Would sucrose test positive or negative with benedicts reagent?
No, surcose is a disaccharide without a hemiacetal group
Why acetoacetic ester gives ferric chloride test?
acetoacetic aster gives ferric chloride test which is a typical test for phenols?
