Which compound has the highest value of pK_a? | vedclass

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

Question

(B) $pK_a$ is inversely proportional to the acidity of the compound $(pK_a \propto 1/K_a)$.Electron-withdrawing groups $(EWG)$ like $-Cl$ increase aci

Vedclass · Accepted Answer

$CH_3-CH_2-COOH$

Vedclass · Answer

(B) $pK_a$ is inversely proportional to the acidity of the compound $(pK_a \propto 1/K_a)$.Electron-withdrawing groups $(EWG)$ like $-Cl$ increase acidity (decrease $pK_a$) through the $-I$ effect.The closer the $EWG$ is to the $-COOH$ group,the stronger the effect.Electron-donating groups $(EDG)$ like alkyl groups increase $pK_a$ (decrease acidity) through the $+I$ effect.Among the given options,$CH_3-CH_2-COOH$ has no electron-withdrawing groups,making it the weakest acid and thus having the highest $pK_a$ value.

Which compound has the highest value of $pK_a$?

Similar Questions

Between $CH_3COOH$ and $HCOOH$,$HCOOH$ will be:

$R-CO-OR' + R''OH \xrightarrow{H^{\oplus}} R-CO-OR'' + R'OH$
The above reaction is an example of:

When sodium bicarbonate $(NaHCO_3)$ is added to an organic compound, brisk effervescence is evolved. This indicates the presence of which functional group?

What is the decreasing order of acidic strength for the following acids?
$[I]$ Methanoic acid
$[II]$ Ethanoic acid
$[III]$ Propanoic acid
$[IV]$ Butanoic acid

Which among the following compounds has the highest boiling point?

Vedclass Test Series

Exam Paper Generator

Online Exam Module