NEET: #73 | Detection of Sulphur | Exam Video Class Lectures

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#73 | Detection of Sulphur

(Chemistry) > Organic Chemistry - Some Basic Principles And Techniques

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Related Practice Questions :

The Prussian blue colour obtained during the test of nitrogen by Lassaigne's test is due to the formation of-

1.	Fe₄[Fe(CN)₆]₃	2.	Na₃[Fe(CN)₆]
3.	Fe(CN)₃	4.	Na₄[Fe(CN)₅NOS]

76%

Level 2: 60%+

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Why is Lassaigne’s extract boiled with concentrated HNO₃ during halogen detection?

1. Helps in the precipitation of AgCl.

2. Increases the solubility product of AgCl.

3. Increases the concentration of NO₃^- ions.

4. Decomposes Na₂S and NaCN, if formed.

65%

Level 2: 60%+

NEET - 2011

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