The ‘brown ring test’ is also known as test for------------A. Halide ionB. Sulphate ionC. Nitrate ionD. Ammonium ion
Question
The ‘brown ring test’ is also known as test for------------
A. Halide ion
B. Sulphate ion
C. Nitrate ion
D. Ammonium ion
Solution
The ‘brown ring test’ is a qualitative analysis test used to detect the presence of nitrate ions (NO₃⁻) in a solution. The test involves adding a few drops of iron(II) sulfate to the solution containing nitrate ions and then carefully adding concentrated sulfuric acid. If nitrate ions are present, a brown ring forms at the interface between the sulfuric acid and the aqueous solution. This brown ring is due to the formation of a complex between iron(II) ions and the produced nitrous acid that forms during the reaction.
So, the correct option is:
Final Answer
C. Nitrate ion
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