Which substance is the yellow solid residue formed on thermal decomposition of lead nitrate?
Answer and explanation
Correct answer: Lead oxide
On heating, lead nitrate decomposes as \(2\mathrm{Pb(NO_3)_2} \xrightarrow{\Delta} 2\mathrm{PbO} + 4\mathrm{NO_2} + \mathrm{O_2}\). The \(\mathrm{PbO}\) formed is the yellow solid residue. Lead chloride, sulphate, or carbonate would require chloride, sulphate, or carbonate ions respectively, none of which are present in this reaction.
Frequently asked questions
What is the correct answer to this question?
Lead oxide
Why is this the correct answer?
On heating, lead nitrate decomposes as \(2\mathrm{Pb(NO_3)_2} \xrightarrow{\Delta} 2\mathrm{PbO} + 4\mathrm{NO_2} + \mathrm{O_2}\). The \(\mathrm{PbO}\) formed is the yellow solid residue. Lead chloride, sulphate, or carbonate would require chloride, sulphate, or carbonate ions respectively, none of which are present in this reaction.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
