A collective noun is a word which we use to define a group or collection of people, animals or things.
Which is/are right?, or are these sentences right?
Singular:
a pack of wolves is ...
an army of ants is...
a set of buttons is...
Plural:
a packs of wolves are ...
an armies of ants are...
a sets of buttons are...
PS. What do you call the 'packs' and what do you call the 'wolves'? Is it identifiers?