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Sulfuric acid having concentration great...

Sulfuric acid having concentration greater than 98.5% `H_2SO_4` cannot be obtained by distillation of an aqueous solution of `H_2SO_4`. Why?

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Sulfuric acid having 98.5% `H_2SO_4` forms a constant boiling mixture having B.P. of 611 K. Hence, dilute sulfuric acid cannot be concentrated beyond 98.5% by distillation.
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ICSE-P-BLOCK ELEMENTS-EXERCISE (PART-II)(DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. Why heating of catalyst is discontinued the moment the oxidation of su...

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

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

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

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

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

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

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

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

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  10. What is an ozoniser ?

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

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  12. How is pure ozone obtained from ozonised oxygen?

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  13. Why group 17 elements are called halogens?

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  14. Which one of the halogens is radioactive ?

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  15. Why do halogens exist as diatomic molecules ?

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  16. Arrange the given halogens in increasing order of boiling points.

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  17. Why is F2 most reactive among halogens ?

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  18. Why is covalent bonding of halogens always sigma bonding?

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  19. Why is I2 more soluble in KI than in water?

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  20. Among the halogen hydrides, which has maximum per cent of ionic charac...

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