Question

A white compound on heating decomposes to give brown fumes and a yellowish residue is left behind. name the compound and write the chemical reaction involved.

Answer 1

(i) Lead nitrate

(ii)2Pb(NO3)2----->2PbO+4NO2+O2

Answer 2

Answer:

The chemical name of white compound is Lead nitrate Pb(NO3)2.

The  compound on heating produces brown fumes. This implies that it contains nitrate ion. This  can be any nitrate but if the residue left after heating is yellow in colour implies that it is lead nitrate.

The type of  reaction is decomposition which is  shown as:

2Pb(NO3)2 → 2PbO + 4NO2 + O2

Explanation: