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JEE Main Chemistry question

ChemistrySome Basic Concepts of ChemistryJEE Main

To neutralise completely 20 mL of 0.1 M aqueous solution of phosphoric acid H₃PO₄, the volume of 0.1 M KOH solution required is:

Answer: (A)

Solution

H₃PO₄ is triprotic: equivalents = 20×0.1×3 = 6 meq; volume KOH = 6/0.1 = 60 mL.

Question ID VK-136316