What is the identity of the brown gas formed on heating lead nitrate?
Answer and explanation
Correct answer: Nitrogen dioxide
On heating, lead nitrate undergoes thermal decomposition: 2Pb(NO₃)₂ → 2PbO + 4NO₂ + O₂. The nitrogen dioxide produced is a reddish-brown gas, so option A is correct. Oxygen is also formed in the reaction but is colourless. Hydrogen and carbon dioxide are not products of lead nitrate decomposition.
Frequently asked questions
What is the correct answer to this question?
Nitrogen dioxide
Why is this the correct answer?
On heating, lead nitrate undergoes thermal decomposition: 2Pb(NO₃)₂ → 2PbO + 4NO₂ + O₂. The nitrogen dioxide produced is a reddish-brown gas, so option A is correct. Oxygen is also formed in the reaction but is colourless. Hydrogen and carbon dioxide are not products of lead nitrate decomposition.
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.
