The black precipitate formed during the test for sulphur by adding dilute acetic acid to the sodium fusion filtrate with the addition of a few drops of lead acetate is Lead sulphide (B).

Here's the step by step process:

1. Sodium fusion test, also known as the Lassaigne's test, is used to detect the presence of nitrogen, sulphur and halogens in an organic compound.

2. In this test, the organic compound is fused with metallic sodium to convert these elements into inorganic ions which can be tested using simple chemical tests.

3. The sodium fusion extract is acidified with acetic acid.

4. Lead acetate is then added to this solution.

5. If sulphur is present in the original organic compound, it reacts with lead acetate to form lead sulphide.

6. Lead sulphide is a black precipitate, hence the observation of a black precipitate indicates the presence of sulphur in the original organic compound.

Question

The black precipitate formed during the test for sulphur by adding dilute acetic acid to the sodium fusion filtrate with the addition of a few drops of lead acetate is Lead sulphide (B).

Here's the step by step process:

1. Sodium fusion test, also known as the Lassaigne's test, is used to detect the presence of nitrogen, sulphur and halogens in an organic compound.

2. In this test, the organic compound is fused with metallic sodium to convert these elements into inorganic ions which can be tested using simple chemical tests.

3. The sodium fusion extract is acidified with acetic acid.

4. Lead acetate is then added to this solution.

5. If sulphur is present in the original organic compound, it reacts with lead acetate to form lead sulphide.

6. Lead sulphide is a black precipitate, hence the observation of a black precipitate indicates the presence of sulphur in the original organic compound.

Knowee AI · Accepted Answer

The black precipitate formed during the test for sulphur by adding dilute acetic acid to the sodium fusion filtrate with the addition of a few drops of lead acetate is Lead sulphide (B).

Here's the step by step process:

1. Sodium fusion test, also known as the Lassaigne's test, is used to detect the presence of nitrogen, sulphur and halogens in an organic compound.

2. In this test, the organic compound is fused with metallic sodium to convert these elements into inorganic ions which can be tested using simple chemical tests.

3. The sodium fusion extract is acidified with acetic acid.

4. Lead acetate is then added to this solution.

5. If sulphur is present in the original organic compound, it reacts with lead acetate to form lead sulphide.

6. Lead sulphide is a black precipitate, hence the observation of a black precipitate indicates the presence of sulphur in the original organic compound.

A black precipitate formed during the test for sulphur by adding dilute acetic acid to the sodiumfusion filtrate with the addition of a few drops of lead acetate is-----------------A. Acetic acetateB. Lead sulphideC. Sodium acetateD. Sodium sulphide

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