Chemical Changes and Reactions — CHEMISTRY STD 9 — Question
ICSE BoardEnglish MediumSTD 9CHEMISTRYChemical Changes and Reactions2 Marks
Question
Explain, giving one example of the following chemical changes: Double decomposition
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Answer
Double decomposition is a type of chemical change in which two compounds in a solution react to form two new compounds by mutual exchange of radicals. Double decomposition reaction is also called a double displacement reaction. $ \mathrm{AB}+\mathrm{CD} \longrightarrow \mathrm{AD}+\mathrm{CB} $ Example - $ \mathrm{AgNO}_3+\mathrm{NaCl} \longrightarrow \mathrm{AgCl} \downarrow+\mathrm{NaNO}_3 $
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