Question

What must happen for a double replacement reaction?
A) The reaction must contain two ionic salts
B) Ions for the two salts gets exchanged to produce new salts
C) Representation of double replacement reaction is \[XY + ZA \to Z + AY\]
D) All of the above

Answer 1

Hint: The double replacement reactions are also known as double displacement reactions as in both there is displacement or replacement of two ionic salts to produce new salts.

Complete step by step answer:
We must have to know that the double replacement reactions are sometimes also known as double displacement reactions.
We need to know that the double Decomposition reactions are the one in which the constituent charges of two reactants interchange itself to form new compounds.
We can write the general representation of double replacement reaction is:
\[XY + ZA \to Z + AY\]
For example:
\[N{a_2}S{O_4} + BaC{l_2} \to BaS{O_4} + 2NaCl\]
In this reaction two salts or compounds are added to produce two different salts. When barium chloride is mixed with sodium sulphate, white precipitate of barium sulphate is formed with sodium chloride salt.
In these types of reactions ions are getting exchanged to form new chemical products.
Option A) this option can be correct as double replacement or double displacement reactions are the one that involves two ionic salts.
Option B) This option can be corrected as two ionic salts react to give new ionic salts as products.
Option C) this option can be correct as the representation of double replacement is:
\[XY + ZA \to Z + AY\] as explained in the above example.
Option D) this is a correct option as all the options given above are correct.

Hence, the correct answer is, ‘Option D’.

Note: We have to remember that the double replacement reactions are also known as neutralization reactions where the two ionic salts get neutralized to give neutral salts or ionic salts.