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A mixture of chlorides of copper, cadmiu...

A mixture of chlorides of copper, cadmium, chromium, iron and aluminium was dissolved in water. It was acidified with dilute `HCI` and then 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 ammonium hydroxide were added. To this excess of sodium hydroxide was added and then filtered. The filtrate shall give test for:

A

sodium and iron

B

sodium, chromium and aluminium

C

aluminium and iron

D

sodium, iron, cadmium and aluminium

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The correct Answer is:
B
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