Question

3. All of the following are strong acids except
A. HNO3
B. HCl
C. N2SO4
D. H3PO4​

Answer 1

Answer:

HCl is the strong acid except

Answer 2

$H_3PO_4$ is not a strong acid.

• The acidity of a species is defined by its hydrogen ion realising tendency. As the hydrogen realising tendency increases the acidity of the species also increases.
• $HNO_3$ is a strong acid called nitric acid and can easily release hydrogen ions.
• $HCl$ is a strong acid called hydrochloric acid and can easily release hydrogen ions.
• $H_2SO_4$ is a strong acid called sulfuric acid and can easily release hydrogen ions.
• $H_3PO_4$ is a weak acid called phosphoric acid and can't easily release hydrogen ions due to strong O-H bonds.
• Hence the correct option is D.