What is the type of reaction that occurs when an acid cancels with a base.

The reaction is called neutralization.

(neutralization)

An acid-base neutralization is not a specific reaction, but rather a category of chemical reactions. The two reactants are, as the name would suggest, an acid and a base. When they react, they form water, and a salt. Salt, in this sense, is used as a inclusive term for the ionic compound formed. It is not always table salt (NaCl).