Question

what are difference between displacement and double displacement reaction?Write revelant for the above​

Answer 1

Answer:

in a displacement reaction, a more reactive element replaces a less reactive element from a compound. In a double displacement reaction, two atoms or a group of atoms switch places to form new compounds. In a displacement reaction, one displacement takes place

Explanation:

Answer 2

Let's understand the difference between Displacement reaction and Double displacement reaction by taking example.

Displacement Reaction

$\sf{Fe+CuSO_4 \rightarrow FeSO_4 + Cu}$

Here, iron displaces copper from copper sulphate in it's aqueous solution and gives ferrous sulphate and copper metal. The above reaction is an example of displacement reaction.

• General equation for displacement reaction is A + BC → B + AC (one displacement takes place).
• It is a slow reaction.
• Change in colour takes place and no precipitation is formed in it.

Double Displacement Reaction

$\sf{Pb(NO_3)_2 + 2KI \rightarrow PbI_2 + 2KNO_3}$

The given reaction is an Double Displacement Reaction. As the ions are displacing each other. Also it is a Precipitation Reaction as yellow precipitates of Lead (II) Iodine are formed.

• General equation for double displacement reaction is AB + CD → AD + CB (two displacement takes place).
• It is a fast reaction.
• Formation of precipitation takes place.