When the solution of substance X is added to a solution of potassium iodide, then a a yellow solid separates out from the solution.
(a) What do you think substance X is likely to be
(b) Name the substance which the yellow solid consists of.
(c ) Which characteristic of chemical reactions is illustrated by this example?
(d) Write a balanced chemical equation for the reaction which takes place. Mention the physical states of all the reactants and products involved in the chemical equation.

Answer

(a) Lead nitrate (b) Lead iodide (c ) Formation of a precipite (d) `Pb(NO_(3))_(2)(aq)+2KI (aq)to PbI_(2)(s)+2KNO_(3)(aq)`