The reaction between CuSO4-Cu(OH)2-Cu(NO3)2 and NO2 can be represented as follows:

2Cu(NO3)2 + 4NO2 -> 2Cu(NO2)2 + 4NO3

In this reaction, the copper ions from Cu(NO3)2 react with the nitrite ions from NO2 to form copper nitrite (Cu(NO2)2) and nitrate ions (NO3).