JEE Advanced · 2010 · 11 Apr 2010 · Paper 2 · p-Block Elements

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The total number of diprotic acids among the following is








Answer: 6

Solution

Diprotic acids can donate exactly 2 protons:
  • H₃PO₄: triprotic (3 ionizable H)
  • H₂SO₄: diprotic ✓
  • H₃PO₃: diprotic (only 2 H attached to O) ✓
  • H₂CO₃: diprotic ✓
  • H₂S₂O₇: diprotic ✓
  • H₃BO₃: monoprotic (acts as Lewis acid)
  • H₃PO₂: monoprotic (only 1 H attached to O)
  • H₂CrO₄: diprotic ✓
  • H₂SO₃: diprotic ✓

Total = 6 diprotic acids.

JEE Advanced · 2010 · 11 Apr 2010 · Paper 2 · Integer answer

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