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Why are the group - 16 elements called c...

Why are the group - 16 elements called chalcogens?

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Chalcogens means ore forming. The elements of group - 16 are called chalcogens because many metals are found as oxides and sulphides and a few as selenides and tellurides.
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OSWAAL PUBLICATION-P - BLOCK ELEMENTS-TOPIC - 2 (GROUP - 15 ELEMENTS, THEIR PROPERTIES AND SOME IMPORTANT COMPOUNDS)(LONG ANSWER TYPE QUESTIONS)
  1. Why are the group - 16 elements called chalcogens?

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  2. What is the outer shell electronic configuration of the chalcogens?

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  3. Name the allotropes of oxygen.

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  4. Which aerosols deplete ozone?

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  5. In the preparation of H(2)SO(4) by contact process, why is SO(3) not a...

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  6. What happens when (i) Conc. H(2)SO(4) is added to CaF(2). (ii) SO(3) i...

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  7. Why does O(3) act as a powerful oxidizing agent?

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  8. Draw the structure of H(2)S(2)O(8).

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  9. Write the structure of oleum (H(2)S(2)O(7))

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  10. Predict the shape and the asked angle (90^(@)" or more or less") in th...

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  11. Oxygen shows catenation behaviour less than sulphur.

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  12. Sulphur has greater tendency for catenation than oxygen why?

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  13. Oxygen is a gas but sulphur a solid. Explain.

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  14. Why are the two S-O bonds in SO(2) molecule of equal strength?

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  15. Draw the structure of O(3) molecule.

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  16. Write the valence shell electronic configuration group - 16 elements.

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  17. How does atomic and ionic radii changes with in the group - 16 element...

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  18. Ionisation enthalphy of group - 16 elements decreases down the group W...

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  19. Group - 16 elements have lower ionisation enthalpy values compared to ...

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  20. Out of O and S which has higher negative electron gain enthalpy and wh...

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