1.Name a solution of substance X is used for whitewashing .Name the substance X and write the formula.Also write the reaction of the substance X named with H2O.
2.When u mix the solution f lead nitrate nd pottassium iodide;
*what is the colour of the precipitate formed?
*write the balanced chemical eqn 4 this reactn
*is this also a double displacement reaction?



1. substance x is calcium oxide CaO . CaO + H2O = Ca(OH)2 
2. yellow precipitate will form
Pb(NO3)2(aq) + 2KI(aq) = PbI2(s) + 2KNO3(aq)
yes it is a double displacement reaction