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(C) The industrial production of phosphorus involves heating a mixture of calcium phosphate (present in bone ash),silica $(SiO_2)$,and coke $(C)$ in a

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Bone ash,silica and coke

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(C) The industrial production of phosphorus involves heating a mixture of calcium phosphate (present in bone ash),silica $(SiO_2)$,and coke $(C)$ in an electric furnace at approximately $1770 \ K$. The chemical reactions are as follows: $2Ca_3(PO_4)_2 + 6SiO_2 \xrightarrow{1770 \ K} 6CaSiO_3 + P_4O_{10}$ $P_4O_{10} + 10C \xrightarrow{1770 \ K} P_4 + 10CO$ Thus,the correct mixture is bone ash,silica,and coke.

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

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