Question:

Which of the following oxoacids of phosphorus is a reducing agent and a monobasic acid as well?

Updated On: Aug 1, 2022
  • $H_4P_2O_5$
  • $HPO_3$
  • $H_3PO_3$
  • $H_3PO_2$
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The Correct Option is D

Solution and Explanation

Acids which contain P?? bonds have strong reducing properties. Hypophosphorus acid (HPO) is a good reducing agent as it contains two P?? bonds. It has one P??H bond, so it is monobasic.
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Concepts Used:

P-Block Elements

  • P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
  • P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.

P block elements consist of: