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 \[{{H}_{3}}P{{O}_{4}}\] \[{{H}_{3}}P{{O}_{4}}\] \[\because \] \[{{H}_{3}}P{{O}_{4}}\]has 3-OH groups in structure \[\therefore \] It is tribasic acid.