Q. If $pK_{a}$ values of four acids are given below at 25$℃$, the strongest acid is
A) 2.0
B) 2.5
C) 3.0
D) 4.0
Explanation
(a)
$pK_{a} = - \log K_{a}\$
Higher the value of $pK_{a}$, weaker is the acid. Among given choices 2.0, 2.5, 3.0 and 4.0 the value 2.0 is lowest so this acid is strongest.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.