question_answer

Orthophosphoric acid is:

A) monobasic  

B)        dibasic

C) tribasic                 

D)        tetrabasic

Correct Answer: C

Solution :

Key Idea:  For oxyacids no. of OH groups in structure = basicity Orthophosphoric acid is \[{{\text{H}}_{\text{3}}}\text{P}{{\text{O}}_{\text{4}}}\] \[\because \] \[{{\text{H}}_{\text{3}}}\text{P}{{\text{O}}_{\text{4}}}\]has 3- OH groups in structure \[\therefore \]It is tribasic acid.