Question

Which of the following is not a double-replacement?

Answer 1

Answer:

The correct answer is option D.

Explanation:

From the given options the reaction which is not a double replacement reaction is:

$Zn (s) + 2HCl (aq)\rightarrow H_2 (g) + ZnCl_2 (s)$

This because the above reaction is an example of single replacement reaction.

$AB+C\rightarrow AC+B$

Whereas;

Double replacement reaction is a type of chemical reaction in which exchange of ions among the reactants take place.

$AB+CD\rightarrow AD+CB$