1.

Select the incorrect option regarding test of NO2- radical:(1) A nitrosyl complex is formed. (2) A brown ring is obtained in brown ring test at the junction of two liquids.(3) Formula of brown ring is [Fe(H2O)5(NO)]SO4.(4) When concentrated H2SO4 is added to nitrate salt, very light brown fumes appears.

Answer»

Correct option is (4) When concentrated H2SO4 is added to nitrate salt, very light brown fumes appears.

\(NO_3-+H_2SO_4(conc.)\rightarrow\)NO2↑(reddish brown) + O2 + SO42- + H2O



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