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List the important sources of sulphur....

List the important sources of sulphur.

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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
  1. Why does Nitrogen exist as N2 white phosphorus as P4 ?

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  2. Why does ozone act as a powerful oxidant?

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  3. List the important sources of sulphur.

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

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  5. Write the anomalous properties of fluorine.

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  6. Mention some important uses of sulphuric acid.

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

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

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

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

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

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

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

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  14. Explain, why NH3is a complexing agent ?

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

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  16. Why does PCI3, fumes in moist air ?

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

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  18. Write basicity of H3PO2,H3PO3 and H3PO4 .

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  19. When iron reacts with HCI, ferrous chloride is formed not ferric chlor...

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  20. How can you prepare CI2 from HCl and HCI from Cl2 ?

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