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NTA Abhyas JEE Main2020Chemistryp Block Elements (Group 15, 16, 17 & 18)Practice

The pair in which phosphorous atom have a formal oxidation state of +3 is

Options

  1. APyrophosphorous and pyrophosphoric acids
  2. BOrthophosphorous and pyrophosphorous acids
  3. CPyrophosphorous and hypophosphoric acids
  4. DOrthophosphorous and hypophosphoric acids

Correct answer

B. Orthophosphorous and pyrophosphorous acids

Step-by-step solution

Acid Formula Formal oxidation state of phosphorous Pyrophosphorous acids H 4 P 2 O 5 +3 Pyrophosphoric acid H 4 P 2 O 7 +5 Orthophosphorous acid H 3 P O 3 +3 Hypophosphoric acid H 4 P 2 O 6 +4 Both pyrophosphorous and orhtophosphorous acids have +3 formal oxidation state.

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