Q12Assertion & reason
In the ring test of NO3 ion, Fe ion reduces nitrate ion to nitric oxide, which 2+ combines with Fe (aq.) ions to form brown complex. Write reactions involved in the formation of brown ring. (2) 257 Model Question Paper-II
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NO3 + 3Fe + 4H → NO + 3Fe + 2H2O 2+ 2+ [Fe(H2O)6] + NO → [Fe(H2O)5(NO)] + H2O Distribution of marks • 1 mark for each equation (1 ×2 = 2 marks)