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Which noble gas is used along with O2 fo...

Which noble gas is used along with `O_2` for respiration by sea divers ?

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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
  1. H2O is a liquid while hydrogen sulphide is a gas at room temperature....

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  2. Write all the members of halogen family.

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  3. Which noble gas is used along with O2 for respiration by sea divers ?

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  4. Which noble gas is called as Hidden gas ?

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  5. Presence of Helium in earth was Ist proved by .

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  6. What is composition of Oleum ?

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  7. What is the role of MnO2 in the preparation of Cl2 from HCI?

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  8. Explain why the ionisation energy of nitrogen is more than that of oxy...

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  9. Write the equation for the reaction between CI2 and dil. NaOH solution...

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  10. Name the process employed for manufacture of NH3 from N2 and H2 .

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  11. Magnesium nitride on bolling with water forms .

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  12. Why is phosphoric acid syrupy in nature ?

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  13. Write the product formed when ammonia reacts with excess of chlorine.

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  14. Why is Iron passive with conc. NHO3 ?

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  15. What is the compound formed during brown ring test for nitrate.

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  16. Which oxide of nitrogen is paramagnetic ?

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  17. Write the structural formula of N2O5.

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  18. Write the allotropic form of phosphorus.

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  19. Which gas is produced when white phosphorus is boiled with NaOH soluti...

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  20. What is the role of MnO2 In the preparation of O2 from KClO3?

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