A) Phenol is more acidic than ethyl alcohol
B) Phenol is less acidic than ethyl alcohol
C) Phenol is more acidic than carboxylic acid
D) Phenol is more acidic than carbonic acid
Correct Answer: A
Solution :
Phenol is more acidic than ethyl alcohol due to inductive effect. \[\overset{-I}{\mathop{\underset{phenol}{\mathop{{{C}_{6}}{{H}_{5}}}}\,-\leftarrow OH}}\,\,\,\,\,\,\underset{ethyl\text{ }alcohol}{\mathop{\overset{+I}{\mathop{{{C}_{2}}{{H}_{5}}\to -OH}}\,}}\,\] By\[-I\] effect acidic character increase and by \[+I\] effect acidic character decreases. In case of phenol \[-{{C}_{5}}{{H}_{5}}\] group shows \[-I\] effect. So, phenol is more acidic than ethyl alcohol.
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