Question

Assertion (A) Lead nitrate on thermal decomposition gives lead oxide, brown coloured nitrogen dioxide and oxygen gas. Reason (R): Lead nitrate reacts with Potassium iodide to form yellow ppt of lead iodide and the reaction is double displacement as well as precipitation reaction.

5 g of ferrous sulphate crystals are heated in a dry boiling tube.

Which one of the following reactions is categoriged as thermal decomposition reaction?

On heating the white crystals of lead nitrate, the following observations were made. Which of these observations are not correct? 2Pb(NO₃)₂(s) → 2PbO(s) + 4NO₂ + O₂(g) i. Evolution of reddish-brown fumes of nitrogen dioxide gas. ii. Crackling sound during the process of heating. iii. Pink residue of lead oxide. iv. Water molecules can be seen trickling on the side of the test tube.