NCERT Solution for Class 10 Science Chapter 1
Chemical Reactions and Equations
Intext Questions
Page No-13
Questions No-2
Give an example of a double displacement reaction other than the one given in Activity 1.10.
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NCERT Solution for Class 10 Science Chapter 1
Chemical Reactions and Equations
Intext Questions
Page No-13
Questions No-2
example of a double displacement reaction is the reaction between silver nitrate (AgNO₃) and sodium chloride (NaCl) to form silver chloride (AgCl) and sodium nitrate (NaNO₃):
AgNO₃ (aq)+NaCl(aq) → AgCl(s)+NaNO₃ (aq)
In this reaction, the silver cation (Ag⁺) from silver nitrate and the sodium cation (Na⁺) from sodium chloride switch places, forming the insoluble silver chloride (AgCl) precipitate. Sodium nitrate remains in the aqueous solution. The formation of the white precipitate of silver chloride is a characteristic feature of this double displacement reaction.
Pb(NO₃)₂ + Ki –> KNO₃
When lead nitrate reacts with potassium iodide, potassium nitrate and lead iodide is formed. In this reaction the both the reactants exchanges their irons after reaction. This type of reaction is known as double displacement reaction.
Sodium carbonate reacts with calcium chloride to form calcium carbonate and sodium chloride.
𝑁𝑎₂𝐶𝑂₃+𝐶𝑎𝐶𝑙₂→ 𝐶𝑎𝐶𝑂₃ +2𝑁𝑎𝐶𝑙
In this reaction, sodium carbonate and calcium chloride exchange ions to form two new compounds. Hence, it is a double displacement reaction.