how can differentiate between aldehyde and ketone
how can differentiate between aldehyde and ketone
Dear user,
Aldehydes 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.
Hope, this answers your question.
Cheers!!
Dear user,
Aldehydes 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. |
Hope, this answers your question.
Cheers!!
