Retro (Past 13 Year) JEE Main (Carboxylic Acids And Acid Derivatives) - JEE MCQ

The complete serise of reaction can be respresented as 

Since, each—COCH₃ group displace one H-atom in the reaction of one mole of  with one  —NH₂ group the molecilar mass increase with 42 unit. Since, the mass increase by (390 - 180) = 210, hence the number of —NH₂ group is  

- I effect exerting (electron withdrawing) groups increase the acidic strength of an acid by withdrawing electron density towards itself, they weakning O-H bond and thus, the release of H⁺ ion by an acid becomes easier.
Whereas + I effect excerting (e^- releasing) groups decreases the acide strength by donating electron density to O-atom.
Further, - I effect decreases with distance. Thus, the acidic strength of the given acids would be :


Hence,  is most acidic and strongth acid than other given compunds.

This is by S_N reaction. Cl^- is a better leaving group than C₂H₅O^- and then ethyl ethanoate is formed.

Fruity smell is the characteristic property of ester, thus the above reaction leads to the formation of ester.

This reaction is called esterification.

C_nH_2nO₂ is general form ula for open chain carboxylic acids and esters.

LiAIH₄ reduces —COOH to —CH₂OH without affecting bond.