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

On heating Pb(NO_3)_2 a brown gas is evolved which undergoes dimerization on cooling. Identify the gas.

Copper turnings upon heating with conc. HNO_(3) evolve a brown gas which dimerises upon cooling. Identify the gas.

When an ideal gas undergoes undestrained expansion, no cooling occurs because the molecules

When an ideal gas undergoes unrestrained expansion, no cooling occurs because the molecules

When an ideal gas undergoes unrestrained expansion, no cooling occurs because the molecules