JEE Main Chemistry question

In the electrothermal process, the compound displaced by silica from calcium phosphate is

(A)Calcium phosphide
(B)Phosphine
(C)Phosphorus
(D)Phosphorus pentoxideCorrect

Answer: (D)

Solution

In the electrothermal (furnace) process for phosphorus, silica is acidic and displaces the more volatile acidic oxide from calcium phosphate, forming calcium silicate slag: 2Ca_3(PO_4)_2 + 6SiO_2 \rightarrow 6CaSiO_3 + P_4O_{10}; the liberated

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Question ID VK-145611