Question:

$P_2O_5$ reacts with $H_2SO_4$ to give $SO_3\, and \, HPO_3$.Which property of $P_2O_5$ is depicted in this reaction ?

Updated On: Jul 6, 2022
  • It acts as a strong dehydrating agent
  • It is a white powder
  • It sublimes on heating
  • It is acidic in nature.
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The Correct Option is A

Solution and Explanation

$ P_2O_5$ a very strong dehydrating agent. That is why it can dehydrate sulphuric acid (to $SO_3$) which itself is a dehydrating agent.
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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: