1. Tardigrade
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  3. Chemistry
  4. Lewis acidity of BCl 3, BPh 3 and BMe 3 with respect to pyridine follows the order

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Q. Lewis acidity of $BCl _{3}, BPh _{3}$ and $BMe _{3}$ with respect to pyridine follows the order

The p-Block Elements

Solution:

$BCl_{3} \to p\pi-p \pi$ back bonding
image
$\therefore BCl_{3}>\, BPH_{3}>\, BMe_{3}$