Which of the following orders of acidic stren | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The acidic strength of carboxylic acids depends on the stability of the conjugate base (carboxylate ion). Electron-withdrawing groups $(EWG)$ incr

Vedclass · Accepted Answer

$HCOOH > CH_3COOH > C_6H_5COOH$

Vedclass · Answer

(C) The acidic strength of carboxylic acids depends on the stability of the conjugate base (carboxylate ion). Electron-withdrawing groups $(EWG)$ increase acidity by stabilizing the negative charge,while electron-donating groups $(EDG)$ decrease acidity.$A$. $Cl_3C-COOH > Cl_2CH-COOH > ClCH_2-COOH$: Correct,as the number of $EWG$ $(Cl)$ increases,acidity increases.$B$. $CH_3CH_2CH(Cl)COOH > CH_3CH(Cl)CH_2COOH > CH_2(Cl)CH_2CH_2COOH$: Correct,as the distance of the $EWG$ from the $-COOH$ group increases,the inductive effect decreases,thus acidity decreases.$C$. $HCOOH > CH_3COOH > C_6H_5COOH$: This order is incorrect. The correct order is $HCOOH > C_6H_5COOH > CH_3COOH$. $C_6H_5COOH$ is more acidic than $CH_3COOH$ because the phenyl group exerts an electron-withdrawing effect through resonance,whereas the methyl group is electron-donating ($+I$ effect).$D$. $CH_3COOH > CH_3CH_2COOH > (CH_3)_2CHCOOH$: Correct,as the number of alkyl groups $(EDG)$ increases,the $+I$ effect increases,which destabilizes the carboxylate ion and decreases acidity.

Which of the following orders of acidic strength is not correct?

Similar Questions

An aryl carboxylic acid on treatment with sodium hydrogen carbonate liberates a gaseous molecule. Identify the gas molecule liberated.

What is a soft soap?

Which of the following compounds is most reactive with $NaHCO_3$?

Maleic anhydride can be prepared by:

Oxalic acid may be distinguished from tartaric acid by

Vedclass Test Series

Exam Paper Generator

Online Exam Module