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What reagent might give a characteristic test for ketone and aldehyde?
Wiki User
∙ 14y ago
Aldehydes and ketones are similar in that they are both chemicals that have an oxygen atom bonded via a double bond to a carbon atom. When this (C=O) part of the chemical structure is at the end of a carbon chain (the carbon atom is bonded to one other carbon atom, one hydrogen atom, plus the double bond with an oxygen atom), this is an aldehyde. When the carbon double bonded to oxygen atom is in the middle of a carbon chain, (bonded to 2 other carbon atoms, one on each side), we have a ketone.
Wiki User
∙ 15y ago
Wiki User
∙ 11y agoAldehydes and ketones can be differentiated as under.
Test
Aldehydes
Ketones
Tollen's reagent test
+ve
Aldehydes reduce Tollens' reagent to form shiny silver mirror.
-ve
Ketones do not reduce Tollens' reagent and hence, there is no formation of shiny silver mirror.
Fehling's solution test
+ve
Aldehydes reduce Fehling's solution to form red precipitates of cuprous oxide.
-ve
Ketones do not reduce Fehling's solution and hence, there is no of red precipitate formation.
Schiff's reagent test
+ve
Aldehydes restore the pink colour of Schiff's reagent.
-ve
Ketones do not restore the pink colour of Schiff's reagent.
Reduction with LiAlH4
Aldehydes get reduced to primary alcohols in presence of LiAlH4.
Ketones get reduced to secondary alcohols in presence of LiAlH4.
murat akgündüz
Wiki User
∙ 11y agoThe silver mirror test using Tollens reagent. Aldehydes reduce Ag+ to form a silver mirror ketones do not.
Wiki User
∙ 11y agoacid consists of mostly carboxylic acids which contain COOH GROUP while aldehyde consists of CHO grup.
acid can donate a proton while aldehyde cant
Wiki User
∙ 14y ago2,4-dinitro phenyl hydrazine form yellow ppts. with aldehyde and ketone on heating.
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∙ 13y agoSeliwanoff's test
Wiki User
∙ 13y agoby fehling solutions
Wiki User
∙ 11y agotollens test and fehlings test
Wiki User
∙ 8y agoA NMR can be used to do this
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Which functional group will not be found on a carbohydrate molecule A Aldehyde B Carboxylic acid C Hydroxyl D Ketone?
It sort of depends on how restrictive your definition of "carbohydrate" is. If you're using it in a way synonymous with "saccharide" (common, but not necessarily the only possible definition), then they will have hydroxyl groups and might have either an aldehyde or a ketone group (or they may not, for example glucose in its hemiacetal form), but they will not have a carboxylic acid group.
How are ketons and aldehydes related to each other?
they have the same functional group
What is the equation for the reaction of CH3CH2MgBr with benzophenone and then ammonium chloride in H2O?
benzophenone, or diphenyl ketone, is a ketone. You might have known that when Grignard reagents react with ketones, the product is a tertiary alcohol. CH3CH2MgBr + (C6H5)2CO-----> CH3CH2(C6H5)2COH (a tertiary alcohol) The ammonium chloride solution merely dissolves this alcohol.
Can you form a grignard reagent with 4-bromoaniline 4-bromobenzoic acid or 4-bromophenol when reacted with Mg in ether and why?
The grignard might form but the reagent prefers to act as a base and will undergo hydrolysis and be destroyerd before isolation in reaction with any compound containing OH groups
What is a chemical reagent?
Reagent bottle is a bottle designed to contain chemical reagents. Bottles are made generally from glass, plastic coated glass, polyethylene. The volumes are extremely variable, from 1 mL to liters.
Which functional group will not be found on a carbohydrate molecule A Aldehyde B Carboxylic acid C Hydroxyl D Ketone?
It sort of depends on how restrictive your definition of "carbohydrate" is. If you're using it in a way synonymous with "saccharide" (common, but not necessarily the only possible definition), then they will have hydroxyl groups and might have either an aldehyde or a ketone group (or they may not, for example glucose in its hemiacetal form), but they will not have a carboxylic acid group.
How are ketons and aldehydes related to each other?
they have the same functional group
What sugar might be present in a sweet tasting food that tests negative with the Benedicts reagent?
Sucrose. Sucrose is a disaccharide therefore does not have free electrons in the sugar to react with the Benedict reagent. Glucose has free electrons therefore shows positive with the Benedict reagent.
What Is the opposite of characteristic?
Covet is a verb and cannot be a characteristic. A characteristic has to be some kind of noun. Covetousness might be a characteristic, and its opposite is generosity.
What is the opposite characteristic of covet?
Covet is a verb and cannot be a characteristic. A characteristic has to be some kind of noun. Covetousness might be a characteristic, and its opposite is generosity.
Situation where you might use the Biuret Reagent colorimetric test?
To test for the presence of starch in cells.
If a molecule smells minty what can you say about its chemistry?
It probably has a ketone, and a ringed structure. It also might end with the suffix -one.
What might Biuret reagent test in a practical real life situation?
Biuret reagent test in a practical situation tests for lipids. Biuret is used in food agents for protein amino acid chains.
Why do you heat substanses with Benedict's reagent with them while testing?
Answer:- It requires energy for the Cu2+ ions in the Benedicts to be reduced to Cu+ Explanation:- Benedicts reagent indicates a reducing sugar because it consists of copper (II) sulphate in an alkaline solution. Its distinctive blue colour turns brick red when it is added to a reducing agent because the Cu2+ ions will be reduced, resulting in copper (I) sulphate, which is brick red. This is where the term "reducing sugars" comes from. All sugars that reduce the benedicts have an available aldehyde or ketone group. It is this group that provides the electron needed to reduce the Benedict's. Because of ionisation energies, even when the reducing sugar is present energy is required to remove the electron from the valence shell. This is why heat is required. It does not, as the previous answer stated, have anything to do with enzymes. Enzymes are globular protein molecules whereas saccharides are ring structured carbohydrate molecules. Do not use any of that answer in any work you might do!
What is meant by a characteristic of a substance?
The Characteristic of a substance is the stuff you find after you masturbate, (if you get heaps it is a good option to go to the Doctor, you might have cancer.),
What general type of reagent might the body use to regenerate vitamin C that was lost in a cooked vegetable?
Vitamin C is often lost when cooking most types of vegetables, such as potatoes or carrots. The reagent that helps the body restore Vitamin C is Glutathione.
What is the equation for the reaction of CH3CH2MgBr with benzophenone and then ammonium chloride in H2O?
benzophenone, or diphenyl ketone, is a ketone. You might have known that when Grignard reagents react with ketones, the product is a tertiary alcohol. CH3CH2MgBr + (C6H5)2CO-----> CH3CH2(C6H5)2COH (a tertiary alcohol) The ammonium chloride solution merely dissolves this alcohol.
