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How is the presence of SO2 detected?...

How is the presence of `SO_2` detected?

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`SO_2` turns acidified potassium dichromate solution green. 'It is due to the reduction of orange coloured dichromate ions to green `Cr^3+)` ions, The test can also' be performed by keeping a filter paper dipped in acidified potassium dichromate in the gas.
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A N EXCEL PUBLICATION-P-BLOCK ELEMENTS-QUESTION BANK
  1. What happens when SO2 is passed through an aqueous solution of Fe (III...

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  2. Comment on the nature of two S-O bonds in SO2 molecule. Are the two S:...

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  3. How is the presence of SO2 detected?

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  4. Mention three areas in which H2SO4plays an important role.

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  5. Write the conditions to maximise the yield of H2SO4 in contact process...

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  6. Why is Ka2 less than Ka1 for H2SO4 in water.?

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

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

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  9. Sea is the greatest source of halogens. Comment.

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  10. Give the reason for the bleaching property of chlorine.

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  11. Name two poisonous gases that can be prepared from chlorine gas

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  12. Why is ICl more reactive than I2 ?

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  13. Why is helium used in diving apparatus?

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

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  15. Elements in the groups 13 to .18 in the periodic table constitute the ...

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  16. Elements in the groups 13 to .18 in the periodic table constitute the ...

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  17. Elements in the groups 13 to .18 in the' periodic table constitute the...

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  18. After a discussion about the structures of hydrides of group-15 elemen...

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  19. After a discussion about the structures of hydrides of group-15 elemen...

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  20. After a discussion about the structures of hydrides of group-15 elemen...

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