Give the correct order of increasing acidity of the following compounds

 

 

 

Let have a look on carboxylate ion

As we can see that resonance structure of carboxylate anion is more stable due to resonance
Now have a look on phenoxide ion

Here we observe that it have 5 resonating structures conclusion in structures of carboxylate ion, the negative charge is on oxygen, but incase of phenoxide ion, the negative charge is present on carbon(in 3 out of 4 structures ). Thus carbohydrates ion is more stable than phenoxide ion. Because C-O bond is much stronger than that C-C bond. Thus carboxylic acid stronger acid than phenol