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2 {XeF}_{4} + 3 H_{2} O \to 4 Xe + 2 {XeO}_{3} + 24 HF + 3 O_{2}

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622. Draw structures of the following species:
(i) H₂,S₂,O₇ (ii)NO₃–.

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623. Assign a reason for the following statement:
Phosphorus (P₄) is more reactive than nitrogen (N₂).

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624. Assign a reason for the following statement:
All the bonds in PCl₅ are not equal in length.

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625. Write the structural formulae of the following compounds:
(i) BrF₃ (ii) XeF_2.

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626. The number of replaceable hydrogen in phosphorus acid is ________.

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627. In P₄O₁₀, the number of oxygen atoms bonded to each phosphorus atom is _________.

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628.

The basicity of phosphorus acid (H₃PO₃) is _____________.

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629.

Dehydration of conc. nitric acid with P₄O₁₀ yields __________.

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630. Ammonia is basic while phosphine is ___________ towards litmus.

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