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Types of Chemical Reactions — Science STD 10 — Question

Tamilnadu BoardEnglish MediumSTD 10ScienceTypes of Chemical Reactions1 Mark
Question
When the lead powder is added to copper chloride solution, a displacement reaction occurs and solid copper is formed.
(i) Write the equation for the reaction.
(ii) Why does the displacement reaction occur?
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Answer

(i) $\quad Pb + CuCl _2 \rightarrow PbCl _2+ Cu \downarrow$
Lead Copper chloride Lead chloride Copper
(ii) Copper is less reactive than lead. So lead has displaced copper from copper chloride. It is a displacement reaction.

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