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Q. The total number of diprotic acids among the following is - $H _{3} PO _{4}, H _{2} SO _{4}, H _{3} PO _{3}, H _{2} CO _{3}, H _{2} S _{2} O _{7}, H _{3} BO _{3}, H _{3} PO _{2}, H _{2} CrO _{4}, H _{2} SO _{3}$

Equilibrium

Solution:

Correct answer is '6.00'

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