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Nitrogen, sulphur and halogens are teste...

Nitrogen, sulphur and halogens are tested from the sodium fusion extract of the organic compound which is commonly known as Lassaigne's extract. For preparing Lassaigen's extract, a small quanty of the organic compound is fused with sodium metal in a fusion tube. The red tube is broken in distilled water, boiled and filtered. This filtrate is known as Lassaigne's extract or sdodium fusion extract.
Which of the following is not applicable to Lassaigne's test

A

The nitrogen, halogens and sulphur are converted into inorganic salts

B

It can be used for the detection of hydrogen in the organic compound

C

During fusion of the organic compound with Sodium, `Na_2 S, NaCN ` and NaX are formed

D

It is possible to differentiate between halogens

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • Nitrogen, sulphur and halogens are tested from the sodium fusion extract of the organic compound which is commonly known as Lassaigne's extract. For preparing Lassaigen's extract, a small quanty of the organic compound is fused with sodium metal in a fusion tube. The red tube is broken in distilled water, boiled and filtered. This filtrate is known as Lassaigne's extract or sdodium fusion extract. In the process of testing elements in Lassaigne's a test, which of the following reactions do not occur.

    A
    `Na+2H_(2)O rarr 2NaOH+H_(2)`
    B
    `2Na+H_(2)+O_(2)rarr2NaOH`
    C
    `Na+C+N rarr NaCN`
    D
    `2Na+S rarr Na_(2)S`

  • Nitrogen, sulphur and halogens are tested from the sodium fusion extract of the organic compound which is commonly known as Lassaigne's extract. For preparing Lassaigen's extract, a small quanty of the organic compound is fused with sodium metal in a fusion tube. The red tube is broken in distilled water, boiled and filtered. This filtrate is known as Lassaigne's extract or sdodium fusion extract. During testing of nitrogen in organic compound by Lassaigne's test, which of the following compounds are formed. (i) NaCN (ii) Fe_(4)[Fe(CN)_(6)]_(3) (iii) Na_(4)[Fe(CN)_(6)] (iv) Fe_(3)[Fe(CN)_(6)]_(4)

    A
    only (i)
    B
    both i and (iii)
    C
    only i, ii, iii
    D
    only ii

  • Nitrogen, sulphur and halogens are tested from the sodium fusion extract of the organic compound which is commonly known as Lassaigne.s extract. For preparing Lassaigen.s extract, a small quantity of the organic compound is fused with sodium metal in a fusion tube. The red tube is broken in distilled water, boiled and filtered. This filtrate is known as Lassaigne.s extract or sodium fusion extract. During testing of nitrogen in organic compound by Lassaigne.s test, which of the following compounds are formed i) NaCN ii) Fe_4[Fe(CN)_6]_3 iii) Na_4[Fe(CN)_6] iv) Fe_3[Fe(CN)_6]_4

    A
    only (i)
    B
    both i and (iii)
    C
    only i, ii, iii
    D
    only ii

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