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How is nitrogen prepared in the laborato...

How is nitrogen prepared in the laboratory? Write the chemical equation of the reaction involved.

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In the laboratory, dinitrogen is.prepared by treating an aqueous solution of ammonium chloride with sodium nitrite. Small amounts of the impurities .NO. and .HNO_3. formed in the reaction can be removed by passing the gas through aqueous sulphuric acid containing potassium dichromate.
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V PUBLICATION-The p-BLOCK ELEMENTS-QUESTION BANK
  1. Discuss the trends in chemical reactivity of group 15 elements.

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  2. Why does NH3 form hydrogen bond but 'PH3 does not?

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  3. How is nitrogen prepared in the laboratory? Write the chemical equatio...

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  4. How is ammonia manufactured industrially?

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  5. Illustrate how copper metal can give different products on reaction wi...

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  6. Give the resonating structures of NO2 and N2 O5

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  7. The HNH angle value is higher than HPH, HAsH and HSbH angles. Why?

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  8. Why does R3P=0 exist but R3N=0 does not. [R = alkyl group]?

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  9. Explain why 'NH3', is basic. while 'BiH3 is only feebly basic.

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  10. Nitrogen exists as diatomic molecule and phosphorus as 'P4'. Why?

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  11. Write main differences between the properties of white phosphorus and ...

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  12. Why does nitrogen show catenation properties less than phosphourus?

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  13. Give the-disproportionation reaction of 'H3 PO3'

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  14. Can 'PCl5', act as oxidising as well as a reducing agent? Justify.

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  15. Justify the placement of '0, S', Se, Te and 'Po' in the same group of ...

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  16. Why is dioxygen a gas, but sulphur a solid?

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  17. Knowing the electron gain enthalpy values for O rarr O^- and O rarr O^...

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  18. Which aerosols deplete ozone?

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  19. Describe the manufacture of 'H2 SO4' by contact process.

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  20. How is SO2 an air pollutant?

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