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  4. The order of ka values of the following acids is :- <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/c-zxk96uy7fees.png />

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Q. The order of ka values of the following acids is :-

Question

NTA AbhyasNTA Abhyas 2020Organic Chemistry – Some Basic Principles and Techniques

Solution:

$\text{Ka} \, \propto \, \text{Acidity}$

$\text{(iv)}$ is most acidic as its conjugate base is stabilized by the two $- \text{OH}$ groups by intra-molecular $\text{H}$ -bonding.

$\text{(ii)}$ is least acidic as conjugate base is not stabiilized by $\text{H}$ -bond.