Q. Which of the following compound is tribasic acid?
A) $H_{3}PO_{2}$
B) $H_{3}PO_{3}$
C) $H_{3}PO_{4}$
D) $H_{4}P_{2}O_{7}$
Explanation
(c)
$\ \ \ \ O$
$\ \ \ \ \ \ \ \ \ \ \ \ ||$
$HO - P - OH$
$\ \ \ \ \ \ \ \ \ \ \ \ |$
$\ \ \ \ \ \ \ \ \ \ \ OH$
it ionizes in three steps because three $–OH$ groups are present
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.