Q.
Phosphorus is manufactured by heating in an electric furnace a mixture of
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a
Bone ash and coke
b
Bone ash and silica
c
Bone ash, silica and coke
d
None of these
answer is C.
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Detailed Solution
Phosphorus is manufactured by heating a mixture of bone ash, silica and coke in an electric furnace. The process is electrothermic process and bone ash contains calcium phosphate.2Ca3(PO4)2+6SiO2→1770K6CaSiO3+P4O10P4O10+10C→1770KP4White+10CO
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