FeSO4 forms brown ring with
Correct answer: C. NO (nitric oxide)
- A. N2O3 (dinitrogen trioxide)
- B. NO3- (nitrate ion)
- C. NO (nitric oxide)
- D. N2O (nitrous oxide)
Explanation
Brown ring test: This is a qualitative test to detect the presence of nitrate ions (NO3-) in a solution. It involves adding ferrous sulfate (FeSO4) and concentrated sulfuric acid (H2SO4) to the solution. If nitrate ions are present, a brown ring forms at the junction of the two liquids.The brown ring is due to the formation of a complex compound called nitroso ferrous sulfate ([Fe(H2O)5(NO)]SO4):Reactions involved:Formation of nitric oxide (NO):2NO3- + 4H+ + 2FeSO4 → 2Fe2(SO4)3 + 2NO + 2H2OFormation of nitroso ferrous sulfate:[Fe(H2O)6]SO4 + NO → [Fe(H2O)5(NO)]SO4 + H2O
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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