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Why bromides and iodides do not respond ...

Why bromides and iodides do not respond to chromyl chloride test ?

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Because chromyl bromide `(CrO_(2)Br_(2))` and chromyl iodide, `(CrO_(2)l_(2))` compounds are unstable and are not formed. In such case bromien and iodine are evolved.
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RESONANCE-QUALITATIVE ANALYSIS (ANION)-Exercise-1
  1. Why is it necessary to test for the acid radicals first with dil. H(2)...

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  2. Why chromyl chloride test is carried out in a dry test tube ?

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  3. Why bromides and iodides do not respond to chromyl chloride test ?

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  4. NaCl on heating with conc. H(2)SO(4) gives HCl where as NaBr and NaI g...

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  5. Dilute Hydrochloric acid contains chloride ions but it doesnot give po...

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  6. Identify the gas A, B and C.

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  7. Why heavy metal chlorides such as Hg(2)Cl(2), AgCl, PbCl(2) etc. do no...

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  8. Why is a freshly prepared solution of FeSO(4) used for the detection o...

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  9. Cu^(2+) " and" Ba^(2+) interfere in the flame test for borate, why ?

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  10. In which of the following reagents, the white precipitate fo PbSO(4) i...

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  11. How will you distinguish between sulphite and sulphate ions ?

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  12. When a metal sulphate is heated in dry test tube, the colour changes f...

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  13. Which of the following can not evolve more than one gas (vapour) if he...

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  14. On heating, a white amorphous inorganic compound becomes yellow and on...

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  15. Which of the following metal carbonates liberate. CO(2)(g) on heating ...

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  16. In which of the following reactions a brown coloured gas is evolved ?

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  17. Why is concentrated HCl used to dissovle the given metal salt in the f...

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  18. The hottest part of the flame of a Bunsen burner is the

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  19. Metal (M) shows crimson red colour in flame test and its halide is del...

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  20. In Borax bead test, metal oxides react with B(2)O(3) and form a colour...

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