tollens test, benedicts tests and more?

[navneetdh]

what more tests do we need to know and what more do we need to know about each of them?

so far i know of these:

tollens test: for aldehydes and alpha hydroxy ketones
also tests for alkynes with triple bond in 1 position and gives yellow ppt
i also have in my notes that it is positive with formic acid like Fehlings reagent but i forgot what I meant by that 🙁

benedicts tests : positive for hemiacetal group? in sugars??

Brady's reagent (2,4-DNP) : positive for carbonyl group.


am i missing some or do i have something wrong??

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[predentgrl]

I'm not sure what is on the test but I'm reviewing my orgo lab and saw:

Lucas test: is a test to differentiate between primary, secondary and tertiary alcohols
Chromic acid test: used to oxidize primary or secondary alcohols and aldehydes
Iodoform Test: used to convert a terminal methyl ketone into the appropriate carboxylic acid.
2,4-dinitrophenylhydrazone: used to qualitatively detect the carbonyl functionality of a ketone or aldehyde functional group

 

[nze82]

what more tests do we need to know and what more do we need to know about each of them?

so far i know of these:

tollens test: for aldehydes and alpha hydroxy ketones
also tests for alkynes with triple bond in 1 position and gives yellow ppt
i also have in my notes that it is positive with formic acid like Fehlings reagent but i forgot what I meant by that 🙁

benedicts tests : positive for hemiacetal group? in sugars??

Brady's reagent (2,4-DNP) : positive for carbonyl group.


am i missing some or do i have something wrong??

The Iodoform test and the Tollen test are two of the most important ones you should know.