Notifications
Clear all
0
30/10/2020 12:45 pm
Topic starter
When crystals of lead nitrate are heated strongly in a dry test tube
(a) crystals immediately melt
(b) a brown residue is left
(c) white fumes appear in the test tube
(d) a yellow residue is left
1 Answer
0
30/10/2020 12:47 pm
(b) Pungent smelling, brown fumes are evolved due to NO2 gas and brown coloured residue of lead oxide (PbO) is left.
2Pb(NO3)2(s) ▵ →2PbO(s) + 4NO2(g) + O2(g)