Ka values of some compound are given below, select the correct order of acidic strength:i.H2O ⇌H++OH-Ka=1 x 10^-14 ii. ROH⇌RO-+H+Ka=1 x 10^-18 iii. RCOOH⇌RCOO-+H+Ka=1 x 10^-5 iv.C6H5OH⇌C6H5O-+ H+Ka=1 x 10^-10

Explanation

The increasing strength of acidities is as follows; carboxylic acids, phenols, water and then ethanol. Students should know that carboxylic acids have two electronegative atoms which make the carboxylate anion stable whereas ethanol has positive inductive effect due to the presence of alkyl groups so it is the least acidic. This order is only followed by option C which is the answer