In which of the following compounds, nitrogen exhibits highest oxidation state? (AIPMT 2012)

Let the oxidation state of nitrogen in the given compounds be x. x 1 2 4 a N H ,2x 1 4 0 2x 4 x 2 x 1 3 b NH ,x 1 3 0 x 3 x 1 3 c N H,3x 1 0 3x 1 x 1/ 3 x 1 2 1 2 d NH OH, x 1 2 2 1 0 x 2 2 1 0 x 1 0 x 1 >> Thus oxidation state of nitrogen is highest in N₃H. 30. Both oxidation and reduction takes place in (AIIMS 2013) (a) NaBr HCl NaCl HBr → (b) 3 3 HBr AgNO AgBr HNO → (c) 2 2 H Br 2HBr → (d) 2 4 4 2 CaO H SO CaSO H O → Both oxidation and reduction are taking place in the foll