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A mixture of "Ca"(3)"P"(2) and "CaC"(2) ...

A mixture of `"Ca"_(3)"P"_(2)` and `"CaC"_(2)` is used in making Holme's signal - Explain.

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A Mixture of `"Ca"_(3)"P"_(2)` and `"CaC"_(2)` is used in Holme's signal. This Mixture containing containers are pierced and thrown in the sea, when the gas is evolved burn and serve as a signal.
The spontaneous combustion of `PH_(3)` is the technical use of Holme's signal.
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VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-P-BLOCK ELEMENTS -GROUP 15 ELEMENTS (VERY SHORT ANSWER QUESTIONS)
  1. How do calcium phosphide and heavy water react ?

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  2. Ammonia is a good complexing agent - Explain with an example.

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  3. A mixture of "Ca"(3)"P"(2) and "CaC"(2) is used in making Holme's sign...

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  4. Which chemical compound is formed in the brown ring test of nitrate io...

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  5. Give the resonating structures of NO(2) and N(2)O(5).

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  6. Why does R(3)P=O exist but R(3)B=O does not (R = alkyl group) ?

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  7. How is nitric oxide (NO) prepared ?

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  8. Give one example each of normal oxide and mixed oxide of nitrogen.

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  9. NO is paramagnetic in gaseous state but diamagnetic in liquid and soli...

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  10. Give an example of acidic oxide of phosphorus

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  11. Give an example of neutral oxide of nitrogen.

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  12. Explain the following reaction of alkali with red phosphrous.

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  13. Explain the following reaction between "PCl"(3) and H(3)PO(3).

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  14. How does "PCl"(3) react with "CH"(3)"COOH"

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  15. How does "PCl"(3) react with "CH"(3)"COOH"

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  16. How does "PCl"(3) react with water.

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  17. PCl(3) can act as an oxidizing as well as a reducing agent - Justify.

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  18. Which of the following are not known ? "PCl"(3),"AsCl"(3),"SbCl"(3),...

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  19. Which of the following is more covalent - "SbCl"(5)" or ""SbCl"(3) ?

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  20. Write the oxidation states of phosphorus in solid "PCl"(5).

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