Q. Which of the following is the weakest acid?
A) $HCl$
B) $HF$
C) $H_{2}SO_{4}$
D) $HNO_{3}$
Explanation
(b)
Higher the tendency to give $H^{+}$ ion ($i.e$., to undergo ionisation), stronger will be the acid or vice-versa.
HF has poor tendency to give $H^{+}$ ion, hence it is the weakest acid among the given.
The order of acidity of given acids is
$H_{2}SO_{4} > HNO_{3} > HCl > HF$.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.