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Red phosphorus may be prepared from whit...

Red phosphorus may be prepared from white phosphorus by :

A

adding red colour to white phosphorus

B

heating white phosphorus to red heat

C

heating white phosphorus in inert atmosphere to `250^(@)C` or at low temperature in the presence of sun light.

D

heating white phosphorus at high pressure and 473 k temperature

Text Solution

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The correct Answer is:
C
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RESONANCE-NITROGEN & OXYGEN FAMILY-Exercise 2
  1. The P - P -P bond angle in white phosphorus is close to :

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  2. Red phosphorus may be prepared from white phosphorus by :

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  3. As Rhombic sulphur is heated in a test tube : {:(,"Process","Tempera...

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  4. Dinitrogen gas is evolved when sodium nitrite is heated below 500^(º)C

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  5. Which statement is not correct for nitrogen?

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  6. Nitrolim is obtained by passing nitrogen over:

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  7. Which of the following have Delta H(f)^(º) lt 0

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  8. CS(2) can separate a mixture of

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  9. Which of the following reaction liberate oxygen ?

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  10. The gases respectively absorbed by alkaline pyrogallon and oil of cinn...

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  11. Alkaline KI is oxidised by ozone to :

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  12. NH(3) can't be obtained by :

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  13. When H(2)S is passed through nitric acid and acidified KMnO(4) solutio...

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  14. Ammonia reacts with red -hot cupric oxide to produce

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  15. Phosphine is not obtained by the reaction

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  16. When ammonia is oxidsed by oxygen in the presence of platinum at 800^(...

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  17. Substances burn more readily in N(2)O than in air because N(2)O:

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  18. Which of the following is a mixed acid anhydride ?

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  19. When an article is bleached by SO(2) it loses its colour. The colour c...

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  20. The true statement for the acids of phosphorus. H(3)PO(2) ,H(3)PO(3) a...

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