Which spirit is identified as having no particular taste?

The spirit characterized as having no particular taste is often understood to refer to a neutral or light flavor profile, which aligns with the nature of Chartreuse. Chartreuse is a herbal liqueur produced by Carthusian monks and is known for its complexity and layered flavors; however, in the context of this question, the intent seems to emphasize its blend of flavors that allows it to function more as a background ingredient in cocktails rather than having a dominant taste of its own.

The other options represent spirits that are distinctly flavored. For instance, Cointreau is a popular orange-flavored liqueur, Chambord is a raspberry liqueur with rich berry flavors, and Pimm's Cup is a fruit cup liqueur with a mix of fruity and herbal notes. Each of these options presents clear, identifiable flavors that contribute to the profiles of cocktails in which they are used, in contrast to Chartreuse's more versatile herbal profile.