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How will you account for the following: Among the hydrides of group 16 elements, water shows unusual physical properties.

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ASSAM ACADEMIC CENTRE-The p-Block Elements-Example
  1. What happens when H3PO3 is heated?

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  2. List the important sources of sulphur.

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

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  4. Answer the following: Why H2O is a liquid whereas H2S is gas at room t...

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  5. Which of the following does not react with oxygen directly? Zn, Ti, Pt...

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  6. Complete the following reactions: C2H4 + O2 rarr

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  7. Complete the following reactions: 4Al + 3O2 rarr

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  8. Why does O3 act as a powerful oxiding agent? How is O3 estimated quant...

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  9. Why does O3 act as a powerful oxiding agent? How is O3 estimated quant...

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  10. What happens when sulphur dioxide is passed through an aqueous solutio...

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  11. Comment on the nature of S-O bonds formed in SO2 molecule. Are these b...

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  12. How is the presence of SO2 detected?

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  13. Write the conditions to maximize the yield of H2SO4 by contact process...

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

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  15. Give two examples of anomalous behaviour of fluorine?

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  16. Sea is the greatest source of some halogens. Comment.

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  17. Explain the bleaching action of Cl2.

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  18. Name two poisonous gases which can be prepared from chlorine gas.

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  19. Why is ICL more reactive than I2?

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  20. Why is Helium used in diving apparatus?

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