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asked in CBSE by (263 points)

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answered by (80k points)

The electron withdrawing groups are more effective in increasing the acidic strength at the para-position relative to the ortho position because of greater dispersal of charge on oxygen atom. 

Resonance structure of phenoxide ion: 

Resonance structure of paranitrophenol

Resonance structures of ortho nitro phenol:

Thus, presence of nitro group at ortho and para position incerease the acidic character

commented by (263 points)
commented by (263 points)
how did you draw this pls explain the steps to draw this or should we study byheart
commented by (80k points)
I have given here the most effective simple solution. However if you will revise your notes and read it again, it must be clear to you.
commented by (263 points)

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