Q. 464.9( 12 Votes )

When the solution of substance X is added to a solution of potassium iodide, then 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 is X as it reacts with potassium iodide to give yellow precipitate.

(b) Lead iodide is the yellow precipitate.

(c) Precipitate formation is shown by this reaction.

(d) Pb(N03) (aq.) + 2KI (aq.)

Pbl2 (s) + 2KN03 (aq.)

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