Given are cyclohexanol (I), acetic acid (II) 2,4,6-trinitrophenol (III) and phenol (IV). In these the order of decreasing acidic character will be :

Options

A. `IIgtIIIgtIVgtI`
B. `IIIgtIVgtIIgtI`
C. `IIIgtIIgtIVgtI`
D. `IIIgtIIgtIgtIV`

Answer

C

Explanation

Phenols and carboxylic acids are more acidic than aliphatic alcohols , therefore , cyclohehexanol (I) is least acidic . Out of two phenols . III is more acidic than IV because of the presence of three electron withdrawing `-NO_(2)` groups on the benzence ring which make O-H bond as highly polarized .Acetic acid (II) is more acidic than phenols and cyclohexanol but less acidic than trinitrophenol. Therefore , correct order is :
`IIIgtIIgtIVgtI`.