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Account for the following: The valenc...

Account for the following:
The valency of oxygen is generally 2, whereas sulfur shows valency of 2, 4 and 6.

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ICSE-P-BLOCK ELEMENTS-EXERCISE (PART-II)(DESCRIPTIVE QUESTIONS)(SHORT ANSWER QUESTIONS)
  1. Members of the oxygen family are called halogens.

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  2. What is catenation ? Explain why oxygen is diatomic, while sulfur is o...

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  3. Account for the following: The valency of oxygen is generally 2, wh...

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  4. Account for the following: Tendency to show -2 oxidation state dimi...

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  5. Explain the following: (a) Oxygen molecule has formula O2 while sul...

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  6. Compare the structural shapes of the following species: (i) SF4 (...

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  7. (a) Draw the molecular structures of the following compounds : (i) N...

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  8. How would you account for the following : (i) The electron gain enth...

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  9. (a) Give reasons for the following: (i) Sulphurin vapour state shows...

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  10. (a) Account for the following observations : (i) SF(4) is easily hyd...

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  11. Explain the following situations : (ii) Sulfur exhibits greater tend...

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  12. Why oxygen differs from the rest of the members of its family?

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  13. Give the structures of the following compounds : (i) Peroxomonosulfu...

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  14. Give reasons for the following : Fluorine shows an oxidation state o...

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  15. Give reasons for the following : Fluorine has lower electron gain en...

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  16. Give reasons for the following : HF has abnormally high melting and ...

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  17. Why the melting and boiling points of halogens increase in going from ...

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  18. How is chlorine produced industrially?

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  19. Why are halogens coloured?

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  20. Why F2 is the strongest oxidising agent, although it has lower electro...

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