Question

Give one test to distinguish between the following pair of chemicals.
Sodium nitrate solution and sodium chloride solution.

Answer 1

Sodium chloride solution and sodium nitrate solution can be distinguished by using conc. Sulphuric acid to the salt solution, add freshly prepared ferrous sulphate solution and pour a few drops of conc. H2SO4 along the sides of the tube. If it's sodium nitrate solution then a brown ring would appear at the junction of the two liquid layers. But if its sodium chloride solution, it would not undergo any visible reaction.