Question

The reaction in which ions are exchanged is called:

• A. displacement
• B. double displacement
• C. combination
• D. precipitation

Hint:

If two ionic solutions react to form a precipitate, think “double displacement.”

Answer 1

The Correct Option is B

Step 1: Definitions.
Double displacement reactions involve mutual exchange of ions between two compounds (AB + CD $\rightarrow$ AD + CB).
Step 2: Note.
Precipitation is a \emph{type} of double displacement where an insoluble solid forms.
Step 3: Conclusion.
Hence the general name is double displacement.