Question

Arrange the following compounds in increasing order of their acidic strength :
Propan -1-ol 2, 4, 6-trinitrophenol, 3-nitrophenol, 3, 5-dinitrophenol, phenol, 4-methylphenol.
A. I lt V lt VI lt III lt IV lt II
B. I lt VI lt V lt III lt IV lt II
C. I lt II lt III lt IV lt V lt VI
D. None of these.

Answer 1

Correct Answer - A
Alcohols are less acidic than phenlos. Presence of `-CH_3` group decreases the acid strength of phenol while presence of one or more `NO_2` group increases the acid strength of phenol.