Question

on heating blue coloured powder of copper (II) nitrate in boiling tube, oxide (black) , oxygen gas and brown gas X is formed, a).write the balanced eqaution of the reaction b). identify the brow gas 'X' evolved c). identify the type of the reaction d). what could be the pH range of (aq) solution of the gas 'X' ?

Answer 1

ii) The brown gas X is nitrogen dioxide, NO2. (1/2)
(iii) Thermal decomposition. (1/2)
(iv) pH< 7
Reason : NO2 dissolves in water to form 

Answer 2

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