When the solution of substance X is added to a solution of potassium iodide, then a yellow solid separates out from the solution. What do you think substance X is likely to be? Name the substance which the yellow solid consists of. Which characteristic of chemical reactions is illustrated by this example? 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.

Substance X is likely to be lead nitrate (Pb(NO3)2), because on reacting with potassium iodide, it forms a yellow precipitate. The yellow solid or precipitate consists of lead iodide (PbI2), which is one of the products in this reaction. This chemical reaction is characterised by the formation of a precipitate. \[\ce{2KI_{(aq)} + Pb(NO3)2_{(aq)} -> PbI2_{(s)} + 2KNO3_{(aq)}}\]

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?

प्रश्न

When the solution of substance X is added to a solution of potassium iodide, then a yellow solid separates out from the solution.

What do you think substance X is likely to be?
Name the substance which the yellow solid consists of.
Which characteristic of chemical reactions is illustrated by this example?
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.

रासायनिक समीकरणे/रचना

लघु उत्तर

उत्तर

Substance X is likely to be lead nitrate (Pb(NO₃)₂), because on reacting with potassium iodide, it forms a yellow precipitate.
The yellow solid or precipitate consists of lead iodide (PbI₂), which is one of the products in this reaction.
This chemical reaction is characterised by the formation of a precipitate.
\[\ce{2KI_{(aq)} + Pb(NO3)2_{(aq)} -> PbI2_{(s)} + 2KNO3_{(aq)}}\]