Question

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.

• A. Sodium and iron
• B. Sodium and aluminium
• C. Aluminium and iron
• D. None of these

Hint:

The chemical tests for sodium and aluminium are distinct and help in their identification in a solution.

Answer 1

The Correct Option is B

Step 1: Understand the reaction sequence.
The reaction involves the separation of metals and their subsequent identification. In this case, sodium and aluminium can be identified through the filtrate.
Step 2: Conclusion.
The filtrate shall give tests for sodium and aluminium. Final Answer: \[ \boxed{\text{Sodium and aluminium}} \]