Question:

Bond dissociation enthalpy of $E?? (E =$ element$)$ bonds is given below. Which of the compounds will act as strongest reducing agent ?

Updated On: Jul 6, 2022
  • $NH_3$
  • $PH_3$
  • $AsH_3$
  • $SbH_3$
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The Correct Option is D

Solution and Explanation

$SbH_3$ will act as strongest reducing agent as it has lowest bond dissociation energy and $Sb??$ bond is weaker.
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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: