- Chemistry
- No Comment
Identify the functional group Carboxylic acid group (-COOH)
AIM – Test and identify the functional group in a given organic compound.
Physicla state – solid
Colour – white
Odour – No smell
Solubility in water – Soluble in water
|
S.No. |
Experiment |
Observations |
Inference |
|
1 |
Nature of the compound – Put a drop of loquid or water solution on moist blue litmus paper |
Litmus paper truns red |
Organic compound is acidic in nature -COOH or Ar-OH may be |
|
2 |
Burning Test : Take some organic compount on copper wire and bring it in to flame |
The compound bruns with non-sooty blue flame |
Compound is aliphatic |
|
3 |
Detection of element– Lassaigne solution + NaOH + freshly prepared FeSO4 solution |
Green ppt | |
|
Add few drops of dil H2SO4 |
Solution does not turns green or blue |
N absent | |
|
4 |
Test for Functional group Aqueous solution of compound + NaHCO3 |
Brisk effevescence colourless odourless gas evolved |
-COOH present Ar-OH absent |
|
5 |
Ester test : Organic compound + 2-3 drop dil. H2SO4 + C2H5OH + heat |
Fruity smell evolved |
-COOH present |
Result- Carboxylic acid group (-COOH) is present in the given organic compound.