A mixture of chlorides of copper, cadmium, chromium, iron, and aluminium was dissolved in water acidified with HCl and hydrogen sulphide gas was passed for sufficient time. It was filtered, boiled and a few drops of nitric acid were added while boiling. To this solution ammonium chloride and sodium hydroxide were added and filtered. The filtrate shall give test for.
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The chemical tests for sodium and aluminium are distinct and help in their identification in a solution.