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Give reasons for the following : HF ha...

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

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ICSE-P-BLOCK ELEMENTS-EXERCISE (PART-II)(DESCRIPTIVE QUESTIONS)(SHORT ANSWER QUESTIONS)
  1. Give reasons for the following : Fluorine shows an oxidation state o...

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

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

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

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  5. How is chlorine produced industrially?

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  6. Why are halogens coloured?

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

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  8. Why are halogens strong oxidising agents?

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  9. Why does fluorine not form polyfluorides?

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  10. What are hallucinogens? Give their two examples. Mention their clinica...

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  11. Why does fluorine exhibit abnormal behaviour ?

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  12. Why special methods are employed for the preparation of HBr and HI ?

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  13. Explain the trends in property in halogen family as given under: (i)...

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  14. How will you account that when chlorine is pased through a fluoride so...

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  15. Fluorine is more electronegative than iodine atom, yet HF has lower ac...

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  16. State the trends observed in case of each of the following: (i) Oxid...

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  17. Give reasons for the following: (i) Binary compounds of oxygen and f...

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  18. What happens when : (i) Cl2 is passed through hot NaOH. (ii) Cl2 ...

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  19. Noble gases are relatively inert elements. Give reasons.

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  20. Why ease to liquefy noble gases increases with increase in atomic numb...

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