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Chemical Reactions and Equations — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceChemical Reactions and Equations3 Marks
Question
What is the difference between displacement and double displacement reactions? aWrite equations for these reactions.
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Answer

Those reactions in which one element takes the place of another element in a compound, Those reactions in which one element takes the place of another element in a compound.
Equation: $\text{CuSO}_4(\text{aq})\ +\ \text{Zn(s)}\ \xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ }\text{ZnSO}_4\ +\ \text{Cu}$
Those reactions in which two compounds react by an exchange of ions to form two new compounds are called double displacement reactions.
Equation: $\text{AgNO}_3(\text{aq})\ +\ \text{NaCl(aq)}\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ }\text{AgCl(s)}\ +\ \text{NaNO}_3(\text{aq})$

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