Question

Which reagent is used to detect sulphur in the sodium fusion extract?

Options

• Silver nitrate solution

• Barium chloride solution

• Sodium nitroprusside solution

• Ammonium molybdate solution

Answer 1

Sodium nitroprusside solution

Explanation: 

Sulphur in the extract forms sodium sulphide, which reacts with sodium nitroprusside to give a violet colour, indicating sulphur.