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

Which of the following oxoacids acts as best reducing agent?

Options

  1. AH 3 P O 3
  2. BH 3 P O 4
  3. CH 4 P 2 O 6
  4. DH 4 P 2 O 7

Correct answer

A. H 3 P O 3

Step-by-step solution

H-atom directly attached with 'P' atom is reducing in nature. H-atom attached with P atom through oxygen atom is acidic in nature. Only orthophosphoric acid H 3 P O 3 has H-atom directly attached with 'P' atom, therefore, it is reducing in nature. Rest other are oxidising agents.

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