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Problem Which of the following ions is responsible for the brown colour in the ring test for a nitrate?
(1) [ Fe ( H 2 O ) 5 NO ] 2 + [\text{Fe}(\text{H}_2\text{O})_5\text{NO}]^{2+} [ Fe ( H 2 O ) 5 NO ] 2 + [ Fe ( CN ) 5 NO ] 2 − [\text{Fe}(\text{CN})_5\text{NO}]^{2-} [ Fe ( CN ) 5 NO ] 2 − [ Fe ( NO 2 ) 6 ] 4 − [\text{Fe}(\text{NO}_2)_6]^{4-} [ Fe ( NO 2 ) 6 ] 4 − [ Fe ( H 2 O ) 5 NO 2 ] + [\text{Fe}(\text{H}_2\text{O})_5\text{NO}_2]^+ [ Fe ( H 2 O ) 5 NO 2 ] + Browse the problem library