Question

on heating blue coloured powder of copper 2 nitrate in a boiling tube, copper oxide and oxygen gas and brown gas X is formed

(a)write a balanced chemical equation

(b)identify the gas evolved

(c)name the type of reaction

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 acidic solution (pH range below 7).