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Write four characteristic properties of ...

Write four characteristic properties of noble gases.

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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
  1. Why does only xenon from stable compounds among the noble gases?

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  2. What was the first noble gas compound and who prepared it?

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  3. Write four characteristic properties of noble gases.

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  4. Why is neon used in beacon light ?

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  5. Which noble gas is used along with O2 for respiration by sea divers ?

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  6. What happens when Nal is heated with conc. H2SO4 ?

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  7. Oxygen exists as O2 while sulphur exists as S8,although they belong to...

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  8. What happens when Cl2 gas is passed through dry slaked lime?

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  9. Why HF cannot be stored in glass bottle ?

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  10. Give one example of each in which SO2 acts as reductant and oxidant re...

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  11. Why is oxygen a gas sulphur a solid at while room temperature ?

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  12. Explain why CIF3 exists where as FCI3 does not.

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  13. What happens when Cl2 gas is passed through a solution of NaI?

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  14. What is aqua regia? What is its use ?

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  15. For dilution of H2SO4,H2O should not be added to conc. H2SO4. Give the...

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  16. Explain why bond angle in H2S is lower than in H2O ?

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  17. A mixture of three gases A, B, C is passed first through acidified K2C...

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  18. Why do noble gases have comparatively large atomic size in a particula...

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  19. Why are halogens coloured ?

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  20. Arrange H2O,H2S,H2Se,H2Te in order of increasing thermal stability.

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