The flame test result of ammonium chloride is colorless or pale white.
When ammonium chloride (NH4Cl) is tested in a flame, it decomposes to produce ammonia gas (NH3) and hydrochloric acid gas (HCl). These gases do not develop a noticeable color during combustion. Therefore, a flame test of ammonium chloride does not usually show a clear color change.
However, in some cases some faint color effects may be observed due to the presence of other components or specific experimental conditions. For example, in a sample of ammonium chloride that contains metal ions or other impurities, these ions may cause a slight color change in the flame. But overall, pure ammonium chloride tends not to show a noticeable color in the flame test.
It should be noted that when using a flame test, accuracy and reliability depend on several factors, including reagent purity, experimental conditions, and comparative references. Therefore, before performing any laboratory analysis, it is important to follow proper protocols and validate the results in conjunction with other analytical methods.