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Why is helium used in diving apparatus ?...

Why is helium used in diving apparatus ?

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As He has low solubility in blood.
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Assertion (A): Helium used in diving apparatus. Reason (R): Helium is very less soluble in blood.

(a) Account for the following : (i) Helium is used in diving apparatus. (ii) Fluorine does not exhibit positive oxidation state. (iii) Oxygen shows catenation behaviour less than sulphur. (b) Draw the structures of the following molecules. (i) XeF_2 (ii) H_2S_2O_8

(a) Complete the following equations : PCl_(5)overset("heat")rarr (ii) C+"Conc."H_(2)SO_(4)rarr (b) Explain giving reason in each case : (i) Halogens are strong oxidising agents. (ii) Fluorine form only one oxoacid, HOF. (iii) Helium is used in diving apparatus.

Noble gases used in diving apparatus and discharge tube is respectively (main use)

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Nitrogen is normally used to maintain an inert atmosphere in metallurgical operations. Why is helium used for the reduction of TiCl_(4) with Mg metal ?

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

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

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  3. How is O(3) estimated quantitatively ?

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

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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 SO2 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 maximize the yield of H(2)SO(4) by contact pro...

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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 three 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 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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