Question

State one observation for the following:

Lead nitrate is heated strongly in a test tube.

Give one significant observation when:

lead nitrate is heated in a test tube.

Answer 1

A yellow solid of lead oxide (PbO) is fused with glass, and a reddish-brown nitrogen dioxide gas is evolved along with O₂.

\[\ce{2Pb(NO3)2 ->[\Delta] 2PbO + 4NO2 + O2}\]

Answer 2

After heating lead nitrate in a test tube, a yellow residue of lead oxide is produced, which fuses with glass, along with the evolution of reddish-brown nitrogen dioxide and colourless oxygen gas.