6- organic test tube reactions

Question 1

how to test for aldehydes (2 ways)

Answer 1

-tollens reagent
silver mirror produced

-fehlings solution
red precipitate produced (contains copper sulfate)

Question 2

positive result for using acidified potassium dichromate

Answer 2

orange solution–>green solution for aldehyde and secondary alcohols

Question 3

how to test for carboxylic acids

Answer 3

-add sodium carbonate solution
effervescence- test for CO2 by bubbling gas through limewater

Question 4

how to test for alcohols

Answer 4

-add acidified potassium dichromate
orange->green solution for primary+secondary alcohols