Answer: The correct answer is Option B.
Explanation:
Double displacement reaction is defined as the chemical reaction in which exchange of ions takes place.
[tex]AB+CD\rightarrow AD+CB[/tex]
An insoluble salt in a solution is termed as a precipitate.
When an aqueous solution of magnesium nitrate reacts with an aqueous solution of potassium carbonate, it leads to the formation of an aqueous solution of potassium nitrate and a solid precipitate of magnesium carbonate.
The chemical equation for the above reaction follows:
[tex]Mg(NO_3)_2(aq.)+K_2CO_3(aq.)\rightarrow MgCO_3(s)+2KNO_3(aq.)[/tex]
Hence, the correct answer is Option B.
