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Why aldehydes give positive test for Fehling's test but ketones give negative test?
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Which aldehyde do not give fhelings test?
All aldehydes give a positive result with Fehling's test. All ketones give negative results.
Why the oxidation of formic acid gives red precipitate while the oxidation of acetic acid not?
I think you are referring to the test using Fehlings solution. Fehlings solution oxidises aldehydes and ketones and formic acid and is in turn reduced. The red precipitate is the copper(I) oxide formed by reduction of the copper(II) complex found in Fehlings solution. Acetic acid is not readily oxidised and so there is no precipitate. See link for more information on what the complex is in Fehlings solution and how it is prepared.
What does Clemmensen reduction do to OH group?
Aldehydes and ketones haven't an -OH group.
Are monomers and polymers of aldehydes and keytones that have hydroxyl groups attached?
No, monomers and polymers of aldehydes and ketones do not have hydroxyl groups attached. Aldehydes and ketones have a carbonyl group (C=O) attached to at least one carbon atom and do not have any hydroxyl groups (-OH) attached to the carbon chain.
What is borsch reagent and its reaction?
bORSCH REAGENT ALSO CALLED bRADY REAGENT .iT IS USED TO DETCT ALDEHYDES AND KETONES
Which two groups have the same functional group?
ketones and aldehydes
Which aldehyde do not give fhelings test?
All aldehydes give a positive result with Fehling's test. All ketones give negative results.
What types of aldehydes and ketones would you expect to be water-soluble?
The aldehydes and ketones having three or less carbon atoms are soluble in water.
Aldehydes and ketones may be reduced to?
alcohol
Why the oxidation of formic acid gives red precipitate while the oxidation of acetic acid not?
I think you are referring to the test using Fehlings solution. Fehlings solution oxidises aldehydes and ketones and formic acid and is in turn reduced. The red precipitate is the copper(I) oxide formed by reduction of the copper(II) complex found in Fehlings solution. Acetic acid is not readily oxidised and so there is no precipitate. See link for more information on what the complex is in Fehlings solution and how it is prepared.
From an organic chemistry perspective carbohydrates are polyhydroxyl?
Aldehydes and ketones
Why are aldehydes more reactive than ketones towards nucleophile?
Aldehydes are less sterically hindered than ketones. Also, aldehydes have fewer electron donating groups (EDG's) which can stabilize an electron-poor area. The extra carbon chain that ketones have that aldehydes do not have are the reason for both of these things. The neighboring carbon to the carbonyl carbon is an EDG and the carbon chain causes steric hindrance.
Why fructose gives positive tollen reagent test?
Only aldehydes give a positive Tollens test. However, under the strongly basic conditions of the test, alpha-hydroxy ketones can isomerize to aldehydes, so they will also give a positive Tollens test. Fructose is an alpha-hydroxy ketone.
What is the principles of tollen's test?
The principle of Tollens' test is to distinguish between aldehydes and ketones. It involves the reduction of silver ions to silver metal in the presence of aldehydes, which results in the formation of a silver mirror on the inner surface of the test tube. Ketones do not give a positive Tollens' test because they do not undergo this reaction with silver ions.
How does ketones react with sodium bicarbonate?
Ketones or Aldehydes DO NOT react with Sodium Bicarbonate..generally only Carboxilic acids have the ability to do it!
What are products of ozonolysis of natural rubber?
alcohols, aldehydes or ketones, or carboxylic acids
What does Clemmensen reduction do to OH group?
Aldehydes and ketones haven't an -OH group.
