Phosphorus is manufactured by heating in an electric furnace a mixture of ____ ?

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Bone ash and coke

Bone ash and silica

Bone ash, silica and coke

None.

answer is C.

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Detailed Solution

Phosphorus is manufactured by heating phosphate rock or bone ash with silica and coke.Ca3(PO4)2+SiO2→CaSiO3+P2O5 P2O5+C→CO+P4

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