The brown ring test for NO2 and \[N{{O}_{3}}^{-}\]is due to the formation of complex ion with the formula [KCET (Eng./Med.) 2000; Kerala PMT 2004]

\[{{\left[ Fe\left( {{H}_{2}}O \right)\text{ }{{\left( NO \right)}_{5}} \right]}^{2+}}\]

\[{{\left[ Fe{{\left( {{H}_{2}}O \right)}_{6}} \right]}^{2+}}\]

\[{{\left[ Fe\left( NO \right)\text{ }{{\left( CN \right)}_{5}} \right]}^{2+}}\]

\[{{\left[ Fe{{\left( {{H}_{2}}O \right)}_{5}}NO \right]}^{2+}}\]

The brown ring test for NO2 and \[N{{O}_{3}}^{-}\]is due to the format

1.	The brown ring test for NO2 and \[N{{O}_{3}}^{-}\]is due to the formation of complex ion with the formula [KCET (Eng./Med.) 2000; Kerala PMT 2004]
A.	\[{{\left[ Fe{{\left( {{H}_{2}}O \right)}_{6}} \right]}^{2+}}\]
B.	\[{{\left[ Fe\left( NO \right)\text{ }{{\left( CN \right)}_{5}} \right]}^{2+}}\]
C.	\[{{\left[ Fe{{\left( {{H}_{2}}O \right)}_{5}}NO \right]}^{2+}}\]
D.	\[{{\left[ Fe\left( {{H}_{2}}O \right)\text{ }{{\left( NO \right)}_{5}} \right]}^{2+}}\]
Answer» D. \[{{\left[ Fe\left( {{H}_{2}}O \right)\text{ }{{\left( NO \right)}_{5}} \right]}^{2+}}\]

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The brown ring test for NO2 and \[N{{O}_{3}}^{-}\]is due to the formation of complex ion with the formula [KCET (Eng./Med.) 2000; Kerala PMT 2004]

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