Question

why is Phosphorus kept under water
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Answer 1

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• ✍️ In water, white phosphorus reacts with oxygen within hours or days. In water with low oxygen, white phosphorus may degrade to a highly toxic compound called phosphine, which eventually evaporates to the air and is changed to less harmful chemicals.

Answer 2

Answer:

White phosphorus is highly reactive, and spontaneously ignites at about 30°C in moist air.  It is usually stored under water, to prevent exposure to the air. It is also extremely toxic, even in very small quantities.