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A mixture of three gases A, B, C is pass...

A mixture of three gases A, B, C is passed first through acidified `K_2Cr_2O_7` solution when A is absorbed turning the `K_2Cr_2O_7` solution green. B gas is absorbed in lime water turning it milky and `'C'` gas is absorbed in terpentine oil. Identify A,B,C .

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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
  1. For dilution of H2SO4,H2O should not be added to conc. H2SO4. Give the...

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

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

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

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  5. Why are halogens coloured ?

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

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  7. How does ozone react with silver metal ?

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  8. What happens when PbS is treated with ozone ?

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  9. The Halogen which has the highest electron affinity :

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

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

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

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  13. How is H2S prepared in the laboratory ?

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

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  15. Explain why F2 does not form oxyacids.

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  16. Explain why halogens are strong oxidising agents.

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

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  18. How does sulphuric acid react with sodium bromide ?

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  19. What is charring of sugar ?

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  20. HF is less volatile than HCl. Explain.

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