Question:

The relative strengths of trichlorides of boron group to accept a pair of electron is given by

Updated On: Jun 6, 2022
  • $GaCl_3 < AlCl_3 < BCl_3$
  • $AlCl_3 < BCl_3 < GaCl_3$
  • $AlCl_3 < GaCl_3 < BCl_3$
  • $BCl_3 < AlCl_3 < GaCl_3$
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The Correct Option is A

Solution and Explanation

Lewis acidic strength is in the order

$Ga X_{3}< Al X_{3}< B X_{3}$

So, acidic strength of trichlorides is as follows:

$GaCl _{3}< AlCl _{3}< BCl _{3}$

Hence, strength of accepting electron is as follows:

$GaCl _{3}> AlCl _{3}> BCl _{3}$
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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.

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