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COMEDK2023Chemistryp Block Elements (Group 15, 16, 17 & 18)

Given are H ₃ PO ₂, H ₃ PO ₃, H ₃ PO ₄ and H ₄ P ₂ O ₇ . Which of the above oxacids results into two series of salts?

Options

  1. AH ₃ PO ₂
  2. BH ₃ PO ₃
  3. CH ₃ PO ₄
  4. DH ₄ P ₂ O ₇

Correct answer

B. H ₃ PO ₃

Step-by-step solution

Phosphorus acid ( H ₃ PO ₃ ) is a diprotic acid. If forms two series of salts such as NaH ₂ PO ₃ and Na ₂ HPO ₃ but none of the type NaPO ₃ with NaOH . Its structure is as

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