Question

Lead nitrate on thermal decomposition produces:

• A. Lead oxide
• B. Nitrogen dioxide
• C. Nitrogen trioxide
• D. Carbon dioxide

Answer 1

Answer: (A), (B)

Nitrogen dioxide

Lead nitrate on heating undergo thermal decomposition reaction to form a yellow residue of lead oxide, brown fumes of nitrogen dioxide and oxygen. The reaction occurs as follows:
$\underset{\text{Lead nitrate}}{2\text{Pb}{\text{(NO}}_3{)}_2\text{(s)}}\stackrel{\text{Heat}}{\to }\underset{\text{Lead oxide}}{2\text{PbO}\text{(s)}}+\underset{\text{Nitrogen dioxide}}{4{\text{NO}}_2\text{(g)}}+\underset{\text{Oxygen}}{{\text{O}}_2\text{(g)}}$