Question:

$H_3PO_3$, phosphorus acid is

Updated On: Jul 6, 2022
  • a diprotic acid
  • a triprotic acid
  • a monoprotic acid
  • not acidic
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The Correct Option is A

Solution and Explanation

Due to more electronegativity difference between $H$ and $O$, the $H$ atom attached to $O$ is detached rather than the $H$ attached to $P$. So, when $H _{3} PO _{3}$ is added to water, only $2 H ^{+}$ions are released, $SO , H _{3} PO _{3}$ is a diprotic acid.
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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: