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Write the structural formula of H3PO3 an...

Write the structural formula of `H_3PO_3` and `H_3PO_4` .

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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
  1. What happens when ammonia is heated with cupric oxide ?

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  2. What happens when ammonium hydroxide is added to sulphate solution fir...

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  3. Write the structural formula of H3PO3 and H3PO4 .

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  4. Why NO2 dimerise to N2O4 ?

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  5. What are the favourable conditions for synthesis of NH3 by Haber's pro...

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  6. Why is PCI5, more covalent than PCI3 ?

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

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

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  9. Why does ozone act as a powerful oxidant?

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  10. List the important sources of sulphur.

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

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  12. Write the anomalous properties of fluorine.

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  13. Mention some important uses of sulphuric acid.

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

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

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

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

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

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

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

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