HARDMCQ SINGLEIChO (Chemistry Olympiad)Inorganic Chemistryp -Block Elements (group 15-18)Achiever Section

Phosphorus is obtained by

A.reducing phosphate rock with coke at a high✓ Correct

B.reducing phosphate rock with sulphur and alumina

C.reducing phosphate rock with silica and iron oxide

D.reducing phosphatic fertilizers with boron and

Explanation

Phosphateissynthesized by the reduction of phosphate rock with coke at high temperature in the presence of silica in an electric furnace. The reaction of which is mentioned below- 3 4 2 2 4 1500 ( ) ( ) ( ) o C Ca PO s CO g CaO CO P → 2 2 CO C CO → 2 3 2 2 ( ) ( ) 2 CaO SiO s CaSiO l CO O CO → → Thus, the correct option is (a)

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