What is observed when testing for chloride ions in solution?

When testing for chloride ions in solution, the formation of a white precipitate is characteristic. This test typically involves adding a silver nitrate solution to the sample containing chloride ions. The reaction produces silver chloride, which is an insoluble salt that appears as a white precipitate. This indicates the presence of chloride ions effectively.

The formation of the white precipitate is a clear visual indicator of the chloride ions in the solution. Other colour changes or precipitate colours mentioned in different options do not correlate with the behavior of chloride ions under these testing conditions. Thus, the observation of a white precipitate serves as conclusive evidence for the presence of chloride ions in the solution.