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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3pn143

Select the correct statement(s) about oxyacids of phosphorus.

  1. A is monobasic and a strong reducing agent.
  2. B is dibasic.
  3. C contains a P-O-P linkage.
  4. D acts as a good reducing agent towards .

Answer: A, B, C

H3PO3 has two ionisable OH groups and H3PO2 has one OH and two P-H bonds (reducing). H4P2O7 has a bridging oxygen. H3PO4 has P(+5) and no P-H bond, so it is not a reductant.
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