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  • The correct order of increasing acidic strength is _____________. (i) Phenol < Ethanol < Chloroacetic acid < Acetic acid (ii) Ethanol < Phenol < Chloroacetic acid < Acetic acid

The correct order of increasing acidic strength is _____________.

(i) Phenol < Ethanol < Chloroacetic acid < Acetic acid

(ii) Ethanol < Phenol < Chloroacetic acid < Acetic acid

(iii) Ethanol < Phenol < Acetic acid < Chloroacetic acid

(iv) Chloroacetic acid < Acetic acid < Phenol < Ethanol

Answers (1)

The answer is the option (iii) Due to formation of more stable conjugate base after removal of \text {H}^{+} phenol is more stable than the alcohol.  

On the other hand, the stable conjugate base formed after removing \text {H}^{+} makes carboxylic acid more acidic than phenol.

In case chloroacetic acid, the presence of electron withdrawing chlorine group makes it more acidic compared to the acetic acid.

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