(A) For the testing of halogens,$HNO_3$ (Nitric acid) is added to the sodium extract. This is done because if $CN^-$ or $S^{2-}$ ions are present in t

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(A) For the testing of halogens,$HNO_3$ (Nitric acid) is added to the sodium extract. This is done because if $CN^-$ or $S^{2-}$ ions are present in the extract,they would interfere with the test by forming $AgCN$ or $Ag_2S$ precipitates. $HNO_3$ decomposes these ions into $HCN$ and $H_2S$ gases,respectively,which are then removed by boiling,ensuring that only halides react with $AgNO_3$.

Class 11 Chemistry 8-3.Organic Chemistry : Purification and characterization Chemical analysis of organic compounds

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Which of the following compounds is added to the sodium extract before the addition of silver nitrate for the testing of halogens?

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A
Nitric acid
B
Ammonia
C
Hydrochloric acid
D
Sodium hydroxide

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Class 11

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8-3.Organic Chemistry : Purification and characterization

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Chemical analysis of organic compounds

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The organic compound that gives the following qualitative analysis is:

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Test	Inference
$a$. Dil. $HCl$	Insoluble
$b$. $NaOH$ solution	Soluble
$c$. $Br_2/\text{water}$	Decolourization

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Which of the following compounds is added to the sodium extract before the addition of silver nitrate for the testing of halogens?

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Sodium fusion extract of aniline,when heated with ferrous sulphate solution and then acidified with concentrated $H_2SO_4$,forms which of the following complexes?

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The organic compound that gives the following qualitative analysis is:

Test Inference

$a$. Dil. $HCl$ Insoluble

$b$. $NaOH$ solution Soluble

$c$. $Br_2/\text{water}$ Decolourization