Question

what is the effect of the following groups on the acidity of phenol??,, -ch3 group and -no2 group
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Answer 1

Answer:

Phenol is more acidic than alcohols due to stabilization of phenoxide ion through resonance. Presence of the electron withdrawing group increases the acidity of phenol by stabilizing phenoxide ion while the presence of the electron releasing group decreases the acidity of phenol by destabilizing phenoxide ion.

Explanation:

here no2 is electron withdrawing whereas ch3 is electron releasing group

Answer 2

Answer:

ch3 decrese the acidity of phenol via +I effect

no2 increase the acidity of phenol via -I effect

acidity can be checked by forming conjugate base

if conjugate base is weaker( as when ch3 is atteched to phenol) then acid is strong

similarly for no2