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Why does Nitrogen exist as N2 white phos...

Why does Nitrogen exist as `N_2` white phosphorus as `P_4` ?

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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
  1. Why is PCI5, more covalent than PCI3 ?

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  2. Explain why the reducing power for the hydrides of Gr-15 increases dow...

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  3. Why does Nitrogen exist as N2 white phosphorus as P4 ?

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  4. Why does ozone act as a powerful oxidant?

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  5. List the important sources of sulphur.

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  6. Name two poisonous gases which can be prepared from Cl2.

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  7. Write the anomalous properties of fluorine.

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  8. Mention some important uses of sulphuric acid.

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  9. Explain, that in SO2 the two S-O bonds are equal in length.

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  10. Why does NH3 form hydrogen bond but PH3 does not ?

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  11. How copper metal gives different products with nitric acid ?

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  12. Write three difference in properties of white phosphorus and red phosp...

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  13. Give example of compounds showing +3, +5 oxidation states for phosphor...

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  14. What happens when NaCl is treated with sulphuric acid in presence of M...

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  15. What happens when Cl2 gas is passed through hot concentrated solution ...

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  16. Explain, why NH3is a complexing agent ?

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  17. Bond angle in phosphonium ion is higher than phosphine. Explain.

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  18. Why does PCI3, fumes in moist air ?

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  19. Explain, why all the bonds In PCI5are not identical.

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  20. Write basicity of H3PO2,H3PO3 and H3PO4 .

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