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

What is aqua regia? What is its use ?

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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
  1. Explain why CIF3 exists where as FCI3 does not.

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

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

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

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

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

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

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  8. Why are halogens coloured ?

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

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  10. How does ozone react with silver metal ?

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  11. What happens when PbS is treated with ozone ?

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  12. The Halogen which has the highest electron affinity :

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  13. Which of the halogens (excluding astatine) has highest electronegativi...

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  14. Which of the halogens (excluding astatine) is strongest oxidant ?

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  15. Which of the halogens (excluding astatine)has lowest ionisation energy...

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  16. How is H2S prepared in the laboratory ?

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  17. How can you prepare HCl gas in the laboratory?

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  18. Explain why F2 does not form oxyacids.

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  19. Explain why halogens are strong oxidising agents.

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  20. Explain why HBr and HI can't be prepared by heating NaBr and Nal with ...

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