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Phosphorus is manufactured by heating in a furnace

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Phosphorus is manufactured by heating in a furnace
A. Bone ash , Sodium chloride and coke
B. Bone ash , silica and coke
C. Bone ash , silica and lime
D. Bone ash , coke and lime stone
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Correct Answer - B
`2Ca_(3)(PO_(4))_(2) +6SiO_(2) overset(Delta)to 6CaSiO_(3) +P_(4)O_(10)`
`P_(4)O_(10) +10C overset(Delta)toP_(4) +10CO`
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