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Why PF5 is known while NF5 is not known?...

Why `PF_5` is known while `NF_5` is not known?

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ASSAM ACADEMIC CENTRE-The p-Block Elements-Example
  1. Fluorine does not exhibit any positive oxidation state. Why?

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  2. Nitrogen is relatively inert as compared to phosphorus. Why?

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  3. Why PF5 is known while NF5 is not known?

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  4. CIF3 exists but FCI3 does not why?

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  5. Give one chemical reaction to show that all the bonds in PCI5 molecule...

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  6. How will you account for the following: Among the hydrides of group 16...

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  7. Bi2O3 is treated with HNO3 write balanced equation for the reaction.

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  8. Why is white phosphorous more reactive than red phosphorous?

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  9. Write the formula of phosphorite.

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  10. What is the product formed on dissolution of phosphorus pentoxide in w...

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  11. Answer the following: Bismuth is a strong oxidizing agent in the penta...

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  12. Write chemical equations for the following processes: chlorine reacts ...

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  13. Write the chemical equations for the following processes: orthophospho...

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  14. Write the chemical equations for the following process. PtF6 and xenon...

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  15. Explain the following observations: hydrogen fluoride has a much highe...

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  16. Explain the following: Electron gain enthalpy for oxygen is less negat...

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  17. Give reasons for the following: NH3 acts as a Lewis base.

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  18. Give reasons for the following: Sulphur vapour is paramagnetic.

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  19. Give reasons: The bond dissociation energy of F2 is less than that of ...

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  20. Explain the following situations: in the structure of HNO3 molecule, t...

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