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Phosphorus is an essential constituent o...

Phosphorus is an essential constituent of both the plants and animals.
Phosphorus is stored under water. Give reason.

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a. Elemental phơsphorus is prepared by heating phosphate rock with Elemental phosphorus is prepared by heating phosphat rock with coke and silica in an electrie furnace at .1770 ~K.. b: ..2 Ca_2, PO_4_2+6 SiO_2 rarr 6 CaSiO_3+P_4 O_40. .dot P_4 O_10+10 C rarr 4 p+10 CO. c. The pliosphorus formed is white phosphorus and it reacts with áir àhd catclies fire, To prevent -phosphoru.s tod react with air. it is stored under water. d. The three allotropic forms of phosphorus are white phosphorus, red phosphorus and black phosphorus d. The three allotropic forms of phospho-
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V PUBLICATION-The p-BLOCK ELEMENTS-QUESTION BANK
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  3. Phosphorus is an essential constituent of both the plants and animals....

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  7. N2 is inert. Why?

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  8. Urea is used as a fertilizer. Why?

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  9. What is the reaction between ammonium and chloroplatinic acid?

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  10. Which property is made use of in separating red phosphorus from white ...

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  11. Which is more stable PCl3 or PCl5 Why?

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  12. Group 16 elements are called chalcogens? Why?

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  13. Which has higher value for 1st ionisation enthalpy - oxygen or nitrog...

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  14. Group 16 elements have higher values of electronegativity. Why?

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  15. Oxygen is a diatomic gas. Why?

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  16. Suluphur has a strong tendency for catenation than oxygen. Why?

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  17. Hydrocarbons are used as fuels. Why?

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  18. Name the anhydride of sulphurous acid. Why is it called so?

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  19. Sulphuir dioxide 'SO2' is, a reducing agent. Why?

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  20. Hot concentrated sulphuric acid is a strong oxidising agent. Why?

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