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How is the presence of SO(2) detected ?...

How is the presence of `SO_(2)` detected ?

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`SO_(2)` converts pink `MnO_(4)^(-)` to colourless `Mn^(+2)`
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Sodium sulphite (Na_(2)SO_(3)) is added to meat as a preservative. The presence of Na_(2)SO_(4) can be detected by adding dil. H_(2)SO_(4) when the pungent smelling gas evolved turns the lime water milky. The gas evolved was detected as sulphur dioxide. The SO_(2) " to "SO_(4)^(2-) in titration. SO_(2)+2H_(2)O+I_(2) to 4H^(+)+SO_(4)^(2-)+2I^(-) In order to check the results of titration, excess barium chloride is added to the final solution. The resulting precipitate is collected and weighed. Q. Which of the following compounds is formed, when Na_(2)SO_(3) is boiled with sulphur.

AAKASH INSTITUTE ENGLISH-THE P-BLOCK ELEMENTS-Try yourself
  1. Complete the following reactions: (i) C(2) H(4) + O(2) to (ii)...

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  2. Why does O(3) act as a powerful oxidising agent?

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  3. How isO(3) estimated quantitatively?

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  4. What happens when sulphur dioxide is passed through an aqueous soluti...

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  5. Comment on the nature of two S–O bonds formed in SO(2) molecule. Are t...

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  6. How is the presence of SO(2) detected ?

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  7. Mention three areas in which H(2) SO(4) plays an important role.

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  8. Write the conditions to maximise the yield of H(2)SO(4) by Contac...

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  9. Why is K(a(2)) ltlt K(a(1)) for H(2) SO(4) in water ?

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  10. Considering the parameters such as bond dissociation enthalpy, electro...

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  11. Give two examples to show the anomalous behaviour of fluorine.

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  12. Give two examples to show the anomalous behaviour of fluorine.

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  13. Sea is the greatest source of some halogens. Comment.

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  14. Name two poisonous gases which can be prepared from chlorine gas.

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  15. Why is ICl more reactive than I(2)?

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  16. Draw structure and give hybridisation of IF(7).

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  17. Why is helium used in diving apparatus?

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  18. Balance the following equation: XeF(6) + H(2) O to XeO(2) F(2) + HF

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  19. Why has it been difficult to study the chemistry of radon?

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  20. List the uses of neon and argon gases.

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