A) phenol
B) m-cresol
C) o-cresol
D) p-cresol
Correct Answer: A
Solution :
The value of \[p{{K}_{a}}\]is minimum for the strongest acid. In the given compounds phenol is the strongest acid because in cresol electrons releasing group (i.e.,\[C{{H}_{3}}\]) 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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