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NO(2) turns acidic KI-starch paper blue,...

`NO_(2)` turns acidic `KI`-starch paper blue, why?

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`NO_(2)` turns `I^(-)` into `l_(2)`, which gives dark blue complex with starch.
`2Kl+H_(2)SO_(4)+NO_(2)toK_(2)SO_(4)+H_(2)O+NO+I_(2)`
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RESONANCE ENGLISH-QUALITATIVE ANALYSIS PART 1-Board level exercis
  1. Give two examples of acid radicals detected with concentrated H(2)SO(4...

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  2. Why a salt containing lead turns black in colour, when placed for a lo...

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  3. NO(2) turns acidic KI-starch paper blue, why?

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  4. Which acidic radical of dil. H(2)SO(4) group gives brown ring test?

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  5. In acidic radical conc. H(2)SO(4) group which radical give's chromyl c...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  20. Dilute Hydrochloride acid contains Cl- ions but it does not give posit...

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