(A) The N2O produced by heating NH4NO3 is a gas. NH4NO3
‌ Heat ‌
→
N2O+2H2O It is diamagnetic as it does not have unpaired electron. N≡N−
..
O
..
: (B) No gaseous product is formed 2NaNO2+H2SO4→2HNO2+Na2SO4 (C) 2‌Pb(NO3)2‌
673K
→
‌4‌NO2+2‌PbO+O2 Nitric oxide and oxygen are gases produced in this. reaction. O2 is paramagnetic because it has two unpaired electrons. NO2 is paramagnetic as it has unpaired electron at nitrogen.