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Oxyacids of Phosphorus

Phosphoric ac...

Question

Phosphoric acid is formed when phosphorus pentoxide reacts with:

A

oxygen

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B

carbon dioxide

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C

alcohol

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D

water

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Solution

The correct option is B water
Phosphorous pentoxide reacts with water to form phosphoric acid, $H_{3} P O_{4}$ . This can be represented by the following reaction.
$P_{2} O_{5} (s) + 3 H_{2} O (l) ⟶ 2 H_{3} P O_{4}$

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