Question

which of the following is a displacement and which is double displacement reaction?
(a)AB+CD -----→ AC+BD
(b)A+BC-----→AC+B​

Answer 1

Answer:

option no. a

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Answer 2

Displacement reaction:

A reaction is which a more reactive element displaces a less reactive element from its compound and binds with the other elements of the compound. The elements can be both Metal or Non-metal.

So, Displacement reaction in above case:

$\large{\boxed{ \sf{B) A + BC \longrightarrow AC + B}}}$

Here B and C combine together to form a compound but A being more reactive than B displace it. And, A itself binds with C leaving behind B.

We can determine the reactivity of any metals and can compare them with the help of reactivity series.

Double-Displacement reaction:

Those reactions in which two different atoms of elements or group atoms are exchanged in order to form compound. This reaction is also known as Metathesis reaction. Here, the elements of compounds are exchanged with each other.

So, Double-displacement in above case:

$\large{\boxed{ \sf{A) AB + CD \longrightarrow AC + BD}}}$

Generally, This type of reaction/ Double-displacement reaction is possible with Ionic compounds where ions can be break and can be exchanged in aqueous solution.

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