Question

2Pb (NO3) 2 (S) =3PBO (S) +4NO2 (g) +O2 (g). balance the equation​

Answer 1

when lead nitrate is heated the reaction is as follows

2Pb(NO3)2 (s)  + heat -------> 2PbO (s) + 4NO2(g) + O2 (g)

here Pb(NO3)2 is lead nitrate.

PbO is lead oxide

NO2 is nitrogen dioxide  

and this is a decomposition reaction as lead nitrate splits up into three elements when heat is supplied.

2) Dear Student,

Ferrous sulphate is green in colour. On heating, the green crystals are converted into a dirty-yellow anhydrous solid as it loses water of crystallization. When further heated, the anhydrous material releases sulphur dioxide and sulphur trioxide leaving a reddish-brown iron oxide.

2 FeSO4 → Fe2O3 + SO2 + SO3

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