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What is oleum ? What is the oxidation st...

What is oleum ? What is the oxidation state of sulfur in it?

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`H_2S_2O_7` formed by the dissolution of `SO_3` in `H_2SO_4`. Oxidation state of sulfur in oleum is + 6.
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ICSE-P-BLOCK ELEMENTS-EXERCISE (PART-II)(DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. What are allotropes of sulfur?

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  2. What do you understand by (a) inert pair effect (b) allotropy and (c...

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  3. What is oleum ? What is the oxidation state of sulfur in it?

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  4. What property of conc. H2SO4 is made use of in each of the following c...

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  5. Give reason why? Conc. H(2)SO(4) is not a drying agent for H(2)S?

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  6. What happens when ozone reacts with KI solution?

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  7. Why a black suspension of lead (II) sulfide in water turns white when ...

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  8. What happens when ozone and hydrogen peroxide are allowed to react wit...

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  9. What is tailing of mercury ?

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  10. What is ozonolysis ?

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  11. Why is O-O bond length in ozone (128 pm) more than in O2 (122 pm)?

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  12. Why ozone is used in improving the atmosphere of crowded places such a...

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  13. Write balanced chemical equations for the preparation of SO2 from a s...

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  14. Why quicklime is not used for drying SO2?

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  15. What is produced when SO2 is dissolved in water?

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  16. Name one substance which can be used as a catalyst in the formation of...

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  17. Write one chemical equation to show that SO2 acts as a reducing agent...

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  18. What happens when SO2 reacts with Cl2 : (i) in presence of sunlight....

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  19. SO2 acts as a bleaching agent. How?

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  20. Dry SO(2) does not bleach dry flowers because

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