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प्रश्न
What is the difference between displacement and double displacement reactions? Write equations for these reactions.
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उत्तर १
Displacement reaction: In a displacement reaction, a more reactive element replaces a less reactive element from a compound.
\[\ce{Zn_{(s)} + CuSO4_{(aq)} -> ZnSO4_{(aq)} + Cu_{(s)}}\]
Double displacement reaction: In a double displacement reaction, two atoms or a group of atoms switch places to form new compounds.
Example: in the reaction between barium chloride and sulphuric acid, barium chloride exchanges its Cl− ions with \[\ce{SO^{2-}4}\] ions of H2SO4.
\[\ce{BaCl2_{(aq)} + H2SO4_{(aq)} -> BaSO4_{(s)} + 2HCl_{(aq)}}\]
उत्तर २
| Sr. No. | Displacement Reaction | Double Displacement Reaction |
| 1. | A displacement reaction is a chemical reaction in which a metal is displaced from its solution by another more reactive metal than the metal being displaced. | A double displacement reaction is a chemical reaction in which ions are exchanged between both reactants. |
| 2. | Example: \[\ce{Zn + CuSO4 -> ZnSO4 + Cu}\] Here, Zinc (Zn), which is more reactive than Cu, displaces copper from its solution. | Example: \[\ce{Na2SO4 + BaCl2 -> BaSO4 + 2NaCl}\] Here, both Na2SO4 and BaCl2 exchange their ions. |
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