Among the following four compounds

Options

A. `d gt c gt a gt b`
B. `c gt d gt a gt b`
C. `a gt d gt c gt b`
D. `b gt a gt c gt d`

Answer

A

Explanation

Electron withdrawing groups such as `NO_(2)` increases the acidic strength of phenol by increasing the stabilizing the phenoxide ion while electron releasing group such as `CH_(3)` decrease the acidic strength of phenol by destabilizing the phenoxide ion. `p-`Nitrophenol is more acidic than `m-`notrophenol on account of additional `-R` effect. Thus, the correct of acidic strength is
`p-`nitrophenol `gtm-`nitrophenol `gt`phenol `gt`methylphenol