The brown ring test for `NO_2^-` and `NO_3^-` is due to the formation of complex ion with a formula -
The brown ring test for `NO_2^-` and `NO_3^-` is due to the formation of complex ion with a formula -
A. `[Fe(H_2O)_6]^(2+)`
B. `[Fe(NO)(CN)_5]^(2+)`
C. `[Fe(H_2O)_5NO]^(2+)`
D. `[Fe(H_2O)(NO)_5]^(2+)`
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