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State the name of anhydride of H2SO4....

State the name of anhydride of `H_2SO_4.`

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Sulfur trioxide.
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ICSE-P-BLOCK ELEMENTS-EXERCISE (PART-II)(DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. What happens when SO2 is passed through caustic soda solution ?

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  2. What is the bond angle in SO2 ?

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  3. State the name of anhydride of H2SO4.

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  4. Why sulfuric acid is described as king of chemicals ?

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  5. Why sulfuric acid is also known as oil of vitriol?

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  6. Why the process of manufacture of H2SO4 is named contact process ?

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  7. In the the manufacture of sulphuric acid by the Contact process ,give ...

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  8. Why vanadium pentoxide is considered as a better catalyst than platini...

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  9. Why heating of catalyst is discontinued the moment the oxidation of su...

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  10. Explain the following giving suitable reasons: In the manufacture of H...

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  11. Sulfuric acid having concentration greater than 98.5% H2SO4 cannot be...

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  12. Why conc. H2SO4 is stored in air tight bottles ?

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  13. What happens when ferrous sulfide is treated with dil. H2SO4 ?

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  14. What is the action of conc. H2SO4 on sulfur?

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  15. Which gas is produced when common salt reacts with conc. H2 SO4 ?

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  16. What is the importance of ozone for plant and animal life on earth?

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  17. Why there is not more than 1.1 parts of ozone per million parts of air...

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  18. What is an ozoniser ?

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  19. Name the conditions for obtaining better yield of O3 from O2.

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  20. How is pure ozone obtained from ozonised oxygen?

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