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Arrange H2O,H2S,H2Se,H2Te in order of in...

Arrange `H_2O,H_2S,H_2Se,H_2Te` in order of increasing thermal stability.

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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
  1. Why do noble gases have comparatively large atomic size in a particula...

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  2. Why are halogens coloured ?

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

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  4. How does ozone react with silver metal ?

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  5. What happens when PbS is treated with ozone ?

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  6. The Halogen which has the highest electron affinity :

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

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

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

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  10. How is H2S prepared in the laboratory ?

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

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  12. Explain why F2 does not form oxyacids.

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  13. Explain why halogens are strong oxidising agents.

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

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  15. How does sulphuric acid react with sodium bromide ?

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  16. What is charring of sugar ?

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  17. HF is less volatile than HCl. Explain.

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  18. Do as directed : F2,Cl2,Br2,I2 (increasing bond dissociation energy)

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  19. Do as directed : H2O,H2S, H2Se, H2Te (Increasing acidic strength)

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  20. HF can form the salt KHF2 while HCl does not form KHCl2. Explain.

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