Question

Difference between displacement and double displacement reaction in three point​

Answer 1

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Single Displacement reaction:-

• In a displacement reaction, a more reactive element replaces a less reactive element from a compound.
• In a displacement reaction, one displacement takes place.A + BX → AX + B

• Change in color takes place with no precipitate forms.
• Metals react with the salt solution of another metal.

Examples:

• 2KI + Cl2 → 2KCl + I2 is a displacement reaction.

• CuSO4 + Zn → ZnSO4 + Cu is also a displacement

Double displacement reaction:-

• In a double displacement reaction, two atoms or a group of atoms switch places to form new compounds.

• In a double displacement reaction, two displacements take place to complete the reaction.AB + CD → AC + BD

• Precipitate is formed.
• Salt solutions of two different metals react with each other.

Examples:

• Na2SO4 + BaCl2 → BaSO4 + 2NaCl is a double displacement reaction.

• 2KBr + BaCl2 → 2KCl + BaBr2 is also a double displacement reaction.