Identify the double displacement reaction from the following.

Correct option is D

​​​The correct answer is option (d)$$Na_2 SO_4 (aq) +BaCl_2 (aq) →BaSO_4 (s) +2NaCl(aq)$$   =   Double displacement reaction.

Information Booster :

 Double displacement reaction : In a double displacement reaction , two compounds exchange their ions to form two new compounds.

The general form is:

$$AB+CD\to AD+CB$$

Option (d) :Na2​SO4​(aq)+BaCl2​(aq)→BaSO4​(s)+2NaCl(aq)​

In this reaction$$Na_2SO_4$$​ and $$BaCl_2$$​exchange ions:.

• ​$$Na^+$$ from $$Na_2SO_4$$ pair with $$Cl^-$$ to form NaCl
• $$\text{Ba}^{2+}$$ from $$BaCl_2$$ pair with $$S O_4^{2-}$$ to form $$Ba SO_4$$    
  

This is a double displacement reaction.

This reaction involves the exchange of ions between two compounds and results in the formation of an insoluble precipitate BaSO₄\text{BaSO₄}$$BaSO_4$$​ making it a double displacement reaction.​