Question

What is this equation an example of: $Zn + 2HCl \to ZnC{l_2} + {H_2}$ ?

Answer 1

Hint : In order to this question, to know which type of equation the given equation is, we should go through the format or general structure of the given reaction, and then conclude the type of equation on the basis of the format.

Complete Step By Step Answer:
The given reaction is: $Zn + 2HCl \to ZnC{l_2} + {H_2}$
The above equation has one reactant's atom(s) given to the other reactant, causing a single replacement.
Single replacement reactions consist of atoms of an element replacing atoms of a second, less reactive element in a compound. This can be modeled by the equation $A + BC\; \to \;AC + B$ . $A{\text{ }}and{\text{ }}B$ must either both be metals, where $C$ is an anion, or they must both be halogens, where $C$ is a cation. Evidence of a chemical reaction can be seen in the formation of a new substance, as seen in the difference of the structure and color of the metals below.
A solitary substitution can be both endothermic and exothermic relying upon the circumstance, which impacts the adjustment of expected energy to perhaps increment or diminishing. Accommodating devices in the conduction of this exploration would incorporate an action arrangement, which would help decide the likeliness a solitary substitution response would happen.

Note :
In double replacement reactions, the elements get replaced in both the reacting compounds. Double replacement reactions also result in the formation of a solid product, which is called a precipitate.