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Phosphorus is manufactred by heating in ...

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

A

Bone ash and coke

B

Bone ash and silica

C

Bone ash, silica and coke

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
`2Ca_(3) (PO_(4))_(2) ("from bone -ash") + 10C + 6SiO_(2) overset(Delta)rarr 6CaSiO_(3) + 10CO + P_(4)(s)` white phosphorus
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RESONANCE-NITROGEN & OXYGEN FAMILY-APSP
  1. Nitrogen gas is prepared :

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  2. With reference to protonic acids, which of the following statements is...

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  3. Phosphorus is manufactred by heating in an electric furnace a mixture ...

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  4. Which of the following may ignite sphontaneously in air ?

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  5. Ozone is obtained from oxygen

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  6. Crown shape of S(8) molecule is present in

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  7. Presence of ozone in a gas sample may be detected by

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  8. Amongest H(2)O,H(2)S,H(2)Se and H(2)Te the one with highest boiling p...

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  9. When ammonia is passed over heated copper oxide, the metallic coper is...

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  10. phosphine is generally prepared in the laboratory

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  11. Cyanamide process is used in the formation of

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  12. Ammonium nitrate decomposes on heating into

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  13. Which one of the following combines with Fe(II) ions to form a brown c...

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  14. Formula for tear gas is

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  15. In P(4)O(10), the number of oxygen atoms bonded to each phosphorus ato...

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  16. In the reaction, H(2)SO(4)+P(2)O(5)overset(Delta)to (X)+SO(3), the pro...

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  17. Bleaching action of SO(2) is due to :

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  18. Ortho phosphoric acid on heating above 300^(@)C gives :

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  19. 1 mol of H(3)PO(2), H(3)PO(3) and H(3)PO(4) will neutralise x mol NaOH...

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  20. Which of the following can convert acidified Cr(2)O(7)^(2-) to green ?

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