what is the test for NO2-
what is the test for NO2-
shamsheer shaik , 14 Years ago
Grade 12
Inorganic Chemistry> Qualitative Analysis...
1 Answers
Aman Bansal
Dear Shamsher,
No simple test to clearly i.d. it, (i) in acid solution it decomposes to give colourless NO gas which rapidly oxidises to nasty brown fumes of NO2, (ii) it decolourises (purple ==> colourless) acidified potassium manganate(VII), (iii) it liberates iodine from acidified potassium iodide solution, (iv) forms ammonia with hot Al powder-foil/NaOH(aq) (see nitrate test) and gives brown ring test - see nitrate tests above
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