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P2O5 is heated with water to give

1. Hypophosphorous acid
2. Phosphorous acid
3. Hypophosphoric acid
4. Orthophosphoric acid

Correct answer: Orthophosphoric acid

Solution

When P2O5 reacts with water, it forms orthophosphoric acid (H3PO4) as the product. This is a well-known reaction of phosphorus pentoxide with water.

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