Arrange the following in increasing order of $\mathrm{pK}_{\mathrm{a}}$ values

Arrange the following in increasing order of $\mathrm{pK}_{\mathrm{a}}$ values
  1. $\mathrm{C} < \mathrm{B} < \mathrm{A} < \mathrm{D}$
  2. $\mathrm{B} < \mathrm{D} < \mathrm{C} < \mathrm{A}$
  3. $\mathrm{A} < \mathrm{D} < \mathrm{B} < \mathrm{C}$
  4. $\mathrm{A} < \mathrm{B} < \mathrm{C} < \mathrm{D}$

Solution



Therefore, larger dissociation and stability of C.B. is governed by the I-effect of the p-substituent. Higher the dissociation of acids into its conjugate base, lower the $\mathrm{pk}_{\mathrm{a}}$ values.

Asked in: AP EAMCET 2022 (06 Jul Shift 1)

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