Question

a soluble salt of lead formed from an insoluble base by double decomposition neutralisation

Answer 1

PbO + HNO3 ----------> Pb(NO3)2 + H2O

Note that PbO is an insoluble base and HNO3 is an acid..... Pb(NO3)2 is a soluble salt of lead.....since by the reaction, only salt and water is formed, it is a neutralization reaction

Answer 2

Answer:PbCO3 + 2HNO3 → Pb(NO3)2 + H2O + CO2

Explanation:An insoluble salt can also be obtained from another insoluble salt by double decomposition.Insoluble salt is first to be converted into a soluble salt, which can then be used for preparing the desired salt.Insoluble lead sulphate is prepared from insoluble lead carbonate by first converting lead carbonate into soluble lead nitrate with the help of dilute nitric acid.