What is the difference between displacement and double displacement reactions ? Write equations for these reactions.

Vedclass pdf generator app on play store
Vedclass iOS app on app store

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

$A + BX \longrightarrow AX + B$;   where $A$ is more reactive than $B$

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

$AB + CD \longrightarrow AD + CB$

For example :

Displacement reaction :

$CuS{O_{4(aq)}}\, + \,Z{n_{(s)}}\, \to \,ZnS{O_{4(aq)}}\, + \,C{u_{(s)}}\,$

Double displacement reaction :

$N{a_2}S{O_{4(aq)}}\, + \,BaC{l_2}_{(aq)}\, \to \,BaS{O_{4(s)}}\, + \,2NaC{l_{(aq)}}\,$

Similar Questions

Write one equation each for decomposition reactions where energy is supplied in the form of heat, light or electricity.

A solution of a substance $‘X’$ is used for whitewashing.

$(i)$ Name the substance $‘X’$ and write its formula.

$(ii)$ Write the reaction of the substance $‘X’$ named in $(i)$ above with water.

Write the balanced equation for the following chemical reactions.

$(i)$ Hydrogen $+$ Chlorine $\to $ Hydrogen chloride

$(ii)$ Barium chloride $+$ Aluminium sulphate $\to $ Barium sulphate $+$ Aluminium chloride

$(iii)$ Sodium $+$ Water $\to $  Sodium hydroxide $+$ Hydrogen

Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions.

Why is respiration considered an exothermic reaction ? Explain.