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What happens when Nal is heated with con...

What happens when Nal is heated with conc. `H_2SO_4` ?

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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
  1. Why is neon used in beacon light ?

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

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

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

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

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  6. Why HF cannot be stored in glass bottle ?

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

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

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

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

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

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

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

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

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

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  16. Why are halogens coloured ?

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

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  18. How does ozone react with silver metal ?

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  19. What happens when PbS is treated with ozone ?

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  20. The Halogen which has the highest electron affinity :

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