Pb(NO_(3))_(2) on heating gives a brown gas which undergoes dimerization on heating. Identify the gas.

Pb(NO_(3))_(2) on heating gives a brown gas which undergoes dimerizati

1.	Pb(NO_(3))_(2) on heating gives a brown gas which undergoes dimerization on heating. Identify the gas.
Answer» Solution :`Pb(NO_(3))_(2)` on heating produces nitrogen dioxide `(NO_(2))`. It is a brown gas. Being an odd electron species on COOLING it UNDERGOES dimerization to form dinitrogen tetroxide `(N_(2)O_(4))` which is COLOURLESS. `underset("Lead nitrate")(2PB(NO_(3))_(2))overset(Delta)to2PbO+underset(("Brown gas"))underset("Nitrogen dioxide")(4NO_(4))+O_(2),underset(("Brown"))(2NO_(2))overset("Cooling")tounderset(("Colourless"))(N_(2)O_(4))`