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The p-Block Elements — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryThe p-Block Elements1 Mark
Question
Why does $PCl_3$ fume in moisture?
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Answer

$PCl_3$ hydrolyses in the presence of moisture giving fumes of HCl.
$\text{PCl}_3+3\text{H}_2\text{O}\ \ \ \rightarrow \ \ \ \text{H}_3\text{PO}_3+3\text{HCl}$

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