Given the balanced equation representing a reaction:

zn(s) + h2so4(aq) → znso4(aq) + h2(g)

which type of reaction is represented by this equation?

1.

decomposition
2.

double replacement
3.

single replacement
4.

synthesis

Option (3) is the correct answer.

Explanation:

A single replacement reaction is defined as the reaction where an element on reaction with a compound tends to displace another element in that compound.

For example, is a single replacement reaction.

Also, when number of atoms on reactant side equal to the number of atoms on product side then it is known as a balanced chemical reaction.

In a synthesis reaction, two elements combine together and result in the formation of a single product.

For example,  

In a decomposition reaction, a compound splits or breaks into two atoms.

For example,  

Thus, we can conclude that represents a balanced single replacement chemical reaction.