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Chalcogens belongs to p-block. Give reas...

Chalcogens belongs to p-block. Give reason.

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Chalcogens are ore forming elements. Most of the ores are oxides and sulphides, therefore oxygen, sulphur and other group 16 elements are called Chalcogens. In O, S, Se, Te and `P_(o)` last electron enters to p - orbital. Therefore Chalcogens belongs to p - block.
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FULL MARKS-P - BLOCK ELEMENTS - II-TEXTBOOK EVALUATION (II. Answer the following questions:)
  1. What is inert pair effect ?

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  2. Chalcogens belongs to p-block. Give reason.

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  3. Explain why fluorine always exhibit an oxidation state of -1 ?

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  4. Give the oxidation state of halogen in the following. (a) OF(2)" ...

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  5. What are interhalogen compounds ? Give examples .

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  6. Why fluorine is more reactive than other halogens?

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  7. Give the uses of helium .

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  8. What is the hybridisation of iodine in IF(7) ? Give its structure .

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  9. Give the balanced equation for the reaction between chlorine with cold...

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  10. How will you prepare chlorine in the laboratory ?

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  11. Give the uses of sulphuric acid.

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  12. Give a reason to support that sulphuric acid is a dehydrating agent.

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  13. Write the reason for the anamolous behaviour of nitrogen .

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  14. Write the molecular formula and structural formula for the following m...

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  15. Give the uses of argon.

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  16. Write the valence shell electronic configuration of group-15 elements.

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  17. Give the equations to illustrate the chemical behaviour of phosphine .

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  18. Give a reaction between nitric acid and a basic oxide.

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  19. What happens when PCl(5) is heated ?

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  20. Suggest a reason why HF is a weak acid, wheres binary acids of the all...

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