A) phenol
B) \[m-\]cresol
C) o-cresol
D) p-cresol
Correct Answer: A
Solution :
[a] The value of\[p{{K}_{a}}\]is minimum for the strongest acid. In the given compound phenol is the strongest acid because in cresol electrons releasing group (ie,\[C{{H}_{3}}\])reduces the stability of phenoxide ion and therefore, acidic nature of cresol reduces. Hence, phenol has the lowest\[p{{K}_{a}}\]value (because maximum value of\[{{K}_{a}})\].
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