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  4. Orthophosphoric acid is:

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Q. Orthophosphoric acid is:

Bihar CECEBihar CECE 2002The p-Block Elements - Part2

Solution:

For oxyacids no. of OH groups in structure = basicity
Orthophosphoric acid is $H_{3}PO_{4} $
image
$\because H _{3} PO _{4}$ has 3-OH groups in structure
$\therefore $ It is tribasic acid.