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Precipitation of second group sulphides ...

Precipitation of second group sulphides in qualitative analysis is carried out with `H_(2)S` in presence of `HCl` and nitric acid.Why?

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`HNO_(3)` a strong oxidant, will oxidise `H_(2)S` to give colloidal sulphur.Thus precipitation of `II` gp. Sulphide will not occur.
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RESONANCE-QUALITATIVE ANALYSIS PART 1-Board level exercis
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  2. In acidic radical conc. H(2)SO(4) group which radical give's chromyl c...

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  3. X^(-)(aq)+AgNO(3)tounderset("white ppt")(AgXdarr) White ppt of AgX d...

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  4. X^(-)(aq)+AgNO(3)tounderset("bright yellow ppt")(AgXdarr) Bright yel...

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  5. Which of the acidic radical gives canary yellow ppt in ammonium molybd...

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  6. Salt + conc. H(2)SO(4)+ Ethyl alcohol overset(Delta) rarr Gas. Evolvin...

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  7. Basic radical which gives Nessler's reagent test in which brown precip...

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  8. In salt solution when H(2)S pass in presence of dil HCl, a orange colo...

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  9. In analysis of II^(nd) gp.A yellow ppt. is obtained which is insoluble...

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  10. What is the group reagent of III^(rd) gp of basic radicals

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  11. A white coloured carbonate which gives apple green color in the flame ...

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  12. Name the three chlorides which are insoluble in dilute HCl.name one ch...

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  13. Both NO(2) and Br(2) are brown gases. How can they be identified if pl...

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  14. Precipitation of second group sulphides in qualitative analysis is car...

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  15. When H(2)S gas is passed through ZnCl(2) solution.ZnS is not precipita...

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  16. HNO(3) or H(2)SO(4) are not used to prepare solution for analysis of b...

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  17. Hydrochloride acid contains Cl- ions but it does not give positive chr...

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  18. What happens when ? (a)Copper sulphate is treated with excess of NH(...

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