Class 11Chemistry8-3.Organic Chemistry : Purification and characterizationChemical analysis of organic compounds
MediumWhy is the Lassaigne's extract boiled with concentrated $HNO_3$ before testing for halogens?
- ATo increase the concentration of $NO_3^-$ ions.
- BTo decompose $Na_2S$ and $NaCN$ formed during the fusion process.
- CTo help in the crystallization of $AgCl$.
- DTo increase the solubility product of $AgCl$.
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Lassaigne's test for nitrogen is negative for which compound?
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View SolutionMatch column $-I$ and column $-II$ with the correct relation:
Column $-I$ Column $-II$ $(i).$ Lassaigne's test $(a).$ By sodium peroxide $(ii).$ Test for nitrogen $(b).$ Acidify with acetic acid $(iii).$ Test for sulphur $(c).$ Acidify with conc. sulphuric acid $(iv).$ Test for phosphorus $(d).$ Fusion with sodium
| Column $-I$ | Column $-II$ |
|---|---|
| $(i).$ Lassaigne's test | $(a).$ By sodium peroxide |
| $(ii).$ Test for nitrogen | $(b).$ Acidify with acetic acid |
| $(iii).$ Test for sulphur | $(c).$ Acidify with conc. sulphuric acid |
| $(iv).$ Test for phosphorus | $(d).$ Fusion with sodium |
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