Question

A white salt on heating decomposes to give brown fumes and a yellow residue is left behind. Name the salt and write the decomposition reaction.

Answer 1

The given white salt is lead nitrate $Pb(N{O}_3{)}_2$

It decomposes to give brown fumes($N{O}_2$) and yellow residue($PbO$). The reaction can be given as follows:

$2Pb(N{O}_3{)}_2\to 2PbO+4N{O}_2+O_2$