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Test for Halogens - (Concept)
The sodium fusion extract is acidified with nitric acid and then treated with silver nitrate. A white precipitate, soluble in ammonium hydroxide shows the presence of chlorine, a yellowish precipitate, sparingly soluble in ammonium hydroxide shows the presence of bromine and a yellow precipitate, insoluble in ammonium hydroxide shows the presence of iodine.
If nitrogen or sulphur is also present in the compound, the sodium fusion extract is first boiled with concentrated nitric acid to decompose cyanide or sulphide of sodium formed during Lassaigne’s test. These ions would otherwise interfere with silver nitrate test for halogens.
| Exam | Chapter |
| JEE MAIN | Purification and Characterisation of Organic Compounds |
For testing of Halogens, the sodium fusion extract of the compound is treated with:
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In the confirmation test for chlorine using solution, the precipitate appears _________ in colour.
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In the estimation of Bromine by Carius method, the Bromine of organic compound is converted into
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During detection of the presence of Iodine in an organic compound, the presence is confirmed when the precipitate is _________ in
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A white precipitate of AgCl dissolves in an aqueous ammonia solution due to the formation of:
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During the halogen test, sodium fusion extract is boiled with concentrated to
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Which one of the following set of elements can be detected using sodium fusion extract ?
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Kinetic theory of gases proves
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Which of the following reagents is used to distinguish halogens in an organic compound?
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When water is added to an organic compound and the red color disappears, the following conclusion can be made:
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Chromyl chloride test is performed for the confirmation of the presence of the following in a mixture:
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Which of the following doesn't give a ppt with solution?
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Given below are two statements :
Statement I : Sulphanilic acid gives esterification test for carboxyl group.
Statement II : Sulphanilic acid gives red colour in Lassigne's test for extra element detection.
In the light of the above statements, choose the most appropriate answer from the options given below:
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The sodium fusion extract is acidified with nitric acid and then treated with silver nitrate.
