The liquid in test tubes A, B, and C containing primary, secondary, and tertiary amines is clear and yellow. Sodium hydroxide is a white liquid with a clear appearance. There are no visible changes in the test tubes once they have been added. Water that has been distilled is a clear, colorless liquid. There is no observable difference when the test tubes are filled with distilled water. The solution of benzene sulphonyl chloride is a transparent liquid. The solutions in B and C turned milky white after being cooled in cold water, and the mixture became transparent. When you put hydrochloric acid in test tube A, it turns milky white. When test tube B is treated in the same way, the solution becomes clearer. When test tube C is treated in the same way, the solution becomes clear.