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The p-Block Elements — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThe p-Block Elements2 Marks
Question
Account for the following observations:
$\mathrm{AlCl}_3$ is a Lewis acid.
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Answer

Electronic configuration of $\mathrm{Al} 2,8,3$. In $\mathrm{AlCl}_3$ it forms three bonds and hence outer shell has 6 electrons. Now Al needs two more electrons to complete its octet. By definition those which accepts electrons are called lewis acids. So $\mathrm{AlCl}_3$ is a Lewis acid.

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