Question

7)

Mg(s) + 2 HCl(aq) + MgCl2(aq) + H2(g)
What type of reaction is shown above?
A)
decomposition
B)
double replacement
C)
synthesis
D)
single replacement

Answer 1

D) single replacement

Step-by-step explanation:

Given reaction:

Mg + 2HCl → MgCl₂ + H₂

The reaction shown above is a single displacement reaction.

In a single displacement reaction, a more reactive atom displaces another from a given compound.

The comparison here is between Mg and H.

On the activity series, Mg is higher and more reactive, it will displace H from the solution of HCl. This

This reaction type is called a single replacement reaction.