Question

What is the difference between displacement and double displacement reaction . write relevant eqautoion for the above

Answer 1

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Single Displacement reaction :-

1. In a displacement reaction, a more reactive element replaces a less reactive element from a compound.

2. Change in colour takes place with no precipitate forms.

3. 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 reaction.

Double displacement reaction :-

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

2. Precipitate is formed.

3. 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.