Question

Consider the given reaction :

2A + 6SiO₂ → 6CaSiO₃ + B

B + 10C → D + 10CO

1. Identify A, B and D.

2. D is stored underwater. Why?

3. Give two examples of oxoacids of D and compounds of D.

Answer 1

1. A – Ca₃(PO₄)₂

B – P₄O₁₀

D – P₄

2. Because P₄ readily catches re in air.

3. Two examples of oxoacids of D and compounds of D

• Oxoacids of D : Oxoacids – Phosphorous acid(H₃PO₄), Phosphoric acid (H₃PO₄).
• Compounds of D : phosphine (PH₃), PCI₅ , PCI₄ , P₄O₆