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Chemical Reactions and Equations — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceChemical Reactions and Equations1 Mark
Question
Give an example of a double displacement reaction.
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Answer

When lead (II) nitrate is mixed with potassium iodide, potassium nitrate and lead iodide are formed.$\text{Pb(NO}_3)_2\ +\ 2\text{Kl}\ \xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ }2\text{KNO}_3\ +\ \text{Pbl}_2$
$\text{Na}_2\text{CO}_3(\text{aq})\ +\ \text{CaCl}_2(\text{aq})\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ \ \ }\text{CaCO}_3(\text{s})\ +\ 2\text{NaCl(aq)}$
Here sodium carbonate and calcium chloride exchange ions to form two new compounds.

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